diff --git a/Mac/OSX/PythonLauncher/FileSettings.h b/Mac/OSX/PythonLauncher/FileSettings.h
index f487469..ea69b58 100755
--- a/Mac/OSX/PythonLauncher/FileSettings.h
+++ b/Mac/OSX/PythonLauncher/FileSettings.h
@@ -37,17 +37,22 @@
 }
 
 + (id)getDefaultsForFileType: (NSString *)filetype;
++ (id)getFactorySettingsForFileType: (NSString *)filetype;
 + (id)newSettingsForFileType: (NSString *)filetype;
 
-- (id)init;
-- (id)initWithFileSettings: (FileSettings *)source;
+//- (id)init;
+- (id)initForFileType: (NSString *)filetype;
+- (id)initForFSDefaultFileType: (NSString *)filetype;
+- (id)initForDefaultFileType: (NSString *)filetype;
+//- (id)initWithFileSettings: (FileSettings *)source;
 
 - (void)updateFromSource: (id <FileSettingsSource>)source;
 - (NSString *)commandLineForScript: (NSString *)script;
 
-- (id)factorySettingsForFileType: (NSString *)filetype;
-- (void)saveDefaults;
-- (void)updateFromUserDefaults: (NSString *)filetype;
-
+//- (void)applyFactorySettingsForFileType: (NSString *)filetype;
+//- (void)saveDefaults;
+//- (void)applyUserDefaults: (NSString *)filetype;
+- (void)applyValuesFromDict: (NSDictionary *)dict;
+- (void)reset;
 
 @end
diff --git a/Mac/OSX/PythonLauncher/FileSettings.m b/Mac/OSX/PythonLauncher/FileSettings.m
index 2147004..89772f6 100755
--- a/Mac/OSX/PythonLauncher/FileSettings.m
+++ b/Mac/OSX/PythonLauncher/FileSettings.m
@@ -9,6 +9,29 @@
 #import "FileSettings.h"
 
 @implementation FileSettings
+
++ (id)getFactorySettingsForFileType: (NSString *)filetype
+{
+    static FileSettings *fsdefault_py, *fsdefault_pyw, *fsdefault_pyc;
+    FileSettings **curdefault;
+    
+    if ([filetype isEqualToString: @"Python Script"]) {
+        curdefault = &fsdefault_py;
+    } else if ([filetype isEqualToString: @"Python GUI Script"]) {
+        curdefault = &fsdefault_pyw;
+    } else if ([filetype isEqualToString: @"Python Bytecode Document"]) {
+        curdefault = &fsdefault_pyc;
+    } else {
+        NSLog(@"Funny File Type: %@\n", filetype);
+        curdefault = &fsdefault_py;
+        filetype = @"Python Script";
+    }
+    if (!*curdefault) {
+        *curdefault = [[FileSettings new] initForFSDefaultFileType: filetype];
+    }
+    return *curdefault;
+}
+
 + (id)getDefaultsForFileType: (NSString *)filetype
 {
     static FileSettings *default_py, *default_pyw, *default_pyc;
@@ -26,9 +49,7 @@
         filetype = @"Python Script";
     }
     if (!*curdefault) {
-        *curdefault = [[FileSettings new] init];
-        [*curdefault factorySettingsForFileType: filetype];
-        [*curdefault updateFromUserDefaults: filetype];
+        *curdefault = [[FileSettings new] initForDefaultFileType: filetype];
     }
     return *curdefault;
 }
@@ -37,42 +58,16 @@
 {
     FileSettings *cur;
     
-    cur = [[FileSettings new] init];
-    [cur initWithFileSettings: [FileSettings getDefaultsForFileType: filetype]];
-    return cur;
-}
-
-- (id)init
-{
-    self = [super init];
-    return [self factorySettingsForFileType: @"Python Script"];
-}
-
-- (id)factorySettingsForFileType: (NSString *)filetype
-{
-    debug = NO;
-    verbose = NO;
-    inspect = NO;
-    optimize = NO;
-    nosite = NO;
-    tabs = NO;
-    others = @"";
-    if ([filetype isEqualToString: @"Python Script"] ||
-        [filetype isEqualToString: @"Python Bytecode Document"]) {
-        interpreter = @"/Library/Frameworks/Python.framework/Versions/Current/bin/python";
-        with_terminal = YES;
-   }  else if ([filetype isEqualToString: @"Python GUI Script"]) {
-        interpreter = @"/Library/Frameworks/Python.framework/Versions/Current/Resources/Python.app/Contents/MacOS/python";
-        with_terminal = NO;
-    } else {
-        NSLog(@"Funny File Type: %@\n", filetype);
-    }
-    origsource = NULL;
-    return self;
+    cur = [FileSettings new];
+    [cur initForFileType: filetype];
+    return [cur retain];
 }
 
 - (id)initWithFileSettings: (FileSettings *)source
 {
+    self = [super init];
+    if (!self) return self;
+    
     interpreter = [source->interpreter retain];
     debug = source->debug;
     verbose = source->verbose;
@@ -82,14 +77,106 @@
     tabs = source->tabs;
     others = [source->others retain];
     with_terminal = source->with_terminal;
+    prefskey = source->prefskey;
+    if (prefskey) [prefskey retain];
     
-    origsource = [source retain];
     return self;
 }
 
-- (void)saveDefaults
+- (id)initForFileType: (NSString *)filetype
 {
-    [origsource updateFromSource: self];
+    FileSettings *defaults;
+    
+    defaults = [FileSettings getDefaultsForFileType: filetype];
+    self = [self initWithFileSettings: defaults];
+    origsource = [defaults retain];
+    return self;
+}
+
+//- (id)init
+//{
+//    self = [self initForFileType: @"Python Script"];
+//    return self;
+//}
+
+- (id)initForFSDefaultFileType: (NSString *)filetype
+{
+    int i;
+    NSString *filename;
+    NSDictionary *dict;
+    NSArray *interpreters;
+    static NSDictionary *factorySettings;
+    
+    self = [super init];
+    if (!self) return self;
+    
+    if (factorySettings == NULL) {
+        NSBundle *bdl = [NSBundle mainBundle];
+        NSString *path = [ bdl pathForResource: @"factorySettings"
+                ofType: @"plist"];
+        factorySettings = [[NSDictionary dictionaryWithContentsOfFile:
+            path] retain];
+        if (factorySettings == NULL) {
+            NSLog(@"Missing %@", path);
+            return NULL;
+        }
+    }
+    dict = [factorySettings objectForKey: filetype];
+    if (dict == NULL) {
+        NSLog(@"factorySettings.plist misses file type \"%@\"", filetype);
+        interpreter = [@"no default found" retain];
+        return NULL;
+    }
+    [self applyValuesFromDict: dict];
+    interpreters = [dict objectForKey: @"interpreter_list"];
+    interpreter = NULL;
+    for (i=0; i < [interpreters count]; i++) {
+        filename = [interpreters objectAtIndex: i];
+        filename = [filename stringByExpandingTildeInPath];
+        if ([[NSFileManager defaultManager] fileExistsAtPath: filename]) {
+            interpreter = [filename retain];
+            break;
+        }
+    }
+    if (interpreter == NULL)
+        interpreter = [@"no default found" retain];
+    origsource = NULL;
+    return self;
+}
+
+- (void)applyUserDefaults: (NSString *)filetype
+{
+    NSUserDefaults *defaults;
+    NSDictionary *dict;
+    
+    defaults = [NSUserDefaults standardUserDefaults];
+    dict = [defaults dictionaryForKey: filetype];
+    if (!dict)
+        return;
+    [self applyValuesFromDict: dict];
+}
+    
+- (id)initForDefaultFileType: (NSString *)filetype
+{
+    FileSettings *fsdefaults;
+    
+    fsdefaults = [FileSettings getFactorySettingsForFileType: filetype];
+    self = [self initWithFileSettings: fsdefaults];
+    if (!self) return self;
+    [self applyUserDefaults: filetype];
+    prefskey = [filetype retain];
+    return self;
+}
+
+- (void)reset
+{
+    if (origsource) {
+        [self updateFromSource: origsource];
+    } else {
+        FileSettings *fsdefaults;
+        fsdefaults = [FileSettings getFactorySettingsForFileType: prefskey];
+        [self updateFromSource: fsdefaults];
+    }
 }
 
 - (void)updateFromSource: (id <FileSettingsSource>)source
@@ -103,6 +190,8 @@
     tabs = [source tabs];
     others = [[source others] retain];
     with_terminal = [source with_terminal];
+    // And if this is a user defaults object we also save the
+    // values
     if (!origsource) {
         NSUserDefaults *defaults;
         NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:
@@ -121,17 +210,10 @@
     }
 }
 
-- (void)updateFromUserDefaults: (NSString *)filetype
+- (void)applyValuesFromDict: (NSDictionary *)dict
 {
-    NSUserDefaults *defaults;
-    NSDictionary *dict;
     id value;
     
-    prefskey = [filetype retain];
-    defaults = [NSUserDefaults standardUserDefaults];
-    dict = [defaults dictionaryForKey: filetype];
-    if (!dict)
-        return;
     value = [dict objectForKey: @"interpreter"];
     if (value) interpreter = [value retain];
     value = [dict objectForKey: @"debug"];
diff --git a/Mac/OSX/PythonLauncher/MyDocument.m b/Mac/OSX/PythonLauncher/MyDocument.m
index 2571857..fdcf86a 100755
--- a/Mac/OSX/PythonLauncher/MyDocument.m
+++ b/Mac/OSX/PythonLauncher/MyDocument.m
@@ -14,13 +14,14 @@
 
 - (id)init
 {
-    [super init];
+    self = [super init];
     if (self) {
     
         // Add your subclass-specific initialization here.
         // If an error occurs here, send a [self dealloc] message and return nil.
-        script = @"<no script>.py";
-        filetype = @"Python Script";    
+        script = [@"<no script>.py" retain];
+        filetype = [@"Python Script" retain];
+        settings = NULL;
     }
     return self;
 }
@@ -42,6 +43,7 @@
 
 - (void)load_defaults
 {
+//    if (settings) [settings release];
     settings = [FileSettings newSettingsForFileType: filetype];
 }
 
@@ -106,8 +108,11 @@
     
     // ask the app delegate whether we should show the UI or not. 
     show_ui = [[[NSApplication sharedApplication] delegate] shouldShowUI];
+    [script release];
     script = [fileName retain];
+    [filetype release];
     filetype = [type retain];
+//    if (settings) [settings release];
     settings = [FileSettings newSettingsForFileType: filetype];
     if (show_ui) {
         [self update_display];
@@ -135,7 +140,7 @@
 
 - (IBAction)do_reset:(id)sender
 {
-    [self load_defaults];
+    [settings reset];
     [self update_display];
 }
 
diff --git a/Mac/OSX/PythonLauncher/PreferencesWindowController.m b/Mac/OSX/PythonLauncher/PreferencesWindowController.m
index 8842162..79344f6 100644
--- a/Mac/OSX/PythonLauncher/PreferencesWindowController.m
+++ b/Mac/OSX/PythonLauncher/PreferencesWindowController.m
@@ -62,7 +62,7 @@
 
 - (IBAction)do_reset:(id)sender
 {
-    [self load_defaults];
+    [settings reset];
     [self update_display];
 }
 
diff --git a/Mac/OSX/PythonLauncher/PythonLauncher.pbproj/project.pbxproj b/Mac/OSX/PythonLauncher/PythonLauncher.pbproj/project.pbxproj
index 063339c..93bd1ea 100755
--- a/Mac/OSX/PythonLauncher/PythonLauncher.pbproj/project.pbxproj
+++ b/Mac/OSX/PythonLauncher/PythonLauncher.pbproj/project.pbxproj
@@ -235,6 +235,7 @@
 				2A37F4B4FDCFA73011CA2CEA,
 				F5A4C13E02F203F601000102,
 				089C165FFE840EACC02AAC07,
+				F5A42167038BDD8E0110C447,
 			);
 			isa = PBXGroup;
 			name = Resources;
@@ -291,6 +292,7 @@
 				INSTALL_MODE_FLAG = "a+rX";
 				INSTALL_PATH = /Applications/Python;
 				LIBRARY_SEARCH_PATHS = "";
+				OPTIMIZATION_CFLAGS = "-O0";
 				OTHER_LDFLAGS = "";
 				PRODUCT_NAME = PythonLauncher;
 				SECTORDER_FLAGS = "";
@@ -430,6 +432,7 @@
 				F58D4A3F02F1F94B01000102,
 				F5A4C13F02F203F701000102,
 				F5449B4C02FB3F7E01000102,
+				F5A42168038BDD8E0110C447,
 			);
 			isa = PBXResourcesBuildPhase;
 			runOnlyForDeploymentPostprocessing = 0;
@@ -577,6 +580,17 @@
 			settings = {
 			};
 		};
+		F5A42167038BDD8E0110C447 = {
+			isa = PBXFileReference;
+			path = factorySettings.plist;
+			refType = 4;
+		};
+		F5A42168038BDD8E0110C447 = {
+			fileRef = F5A42167038BDD8E0110C447;
+			isa = PBXBuildFile;
+			settings = {
+			};
+		};
 		F5A4C13E02F203F601000102 = {
 			isa = PBXFileReference;
 			path = PreferenceWindow.nib;
diff --git a/Mac/OSX/PythonLauncher/factorySettings.plist b/Mac/OSX/PythonLauncher/factorySettings.plist
new file mode 100644
index 0000000..5b81d7d
--- /dev/null
+++ b/Mac/OSX/PythonLauncher/factorySettings.plist
@@ -0,0 +1,79 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+        <key>Python GUI Script</key>
+        <dict>
+                <key>debug</key>
+                <false/>
+                <key>inspect</key>
+                <false/>
+                <key>interpreter_list</key>
+                <array>
+                    <string>/usr/local/bin/pythonw</string>
+                    <string>/sw/bin/pythonw</string>
+                    <string>/Library/Frameworks/Python.framework/Versions/Current/Resources/Python.app/Contents/MacOS/python</string>
+                    <string>/usr/bin/pythonw</string>
+                    <string>/Applications/MacPython-OSX/python-additions/Python.app/Contents/MacOS/python</string>
+                </array>
+                <key>nosite</key>
+                <false/>
+                <key>optimize</key>
+                <false/>
+                <key>others</key>
+                <string></string>
+                <key>verbose</key>
+                <false/>
+                <key>with_terminal</key>
+                <false/>
+        </dict>
+        <key>Python Script</key>
+        <dict>
+                <key>debug</key>
+                <false/>
+                <key>inspect</key>
+                <false/>
+                <key>interpreter_list</key>
+                <array>
+                    <string>/usr/local/bin/python</string>
+                    <string>/sw/bin/python</string>
+                    <string>/Library/Frameworks/Python.framework/Versions/Current/bin/python</string>
+                    <string>/usr/bin/python</string>
+                </array>
+                <key>nosite</key>
+                <false/>
+                <key>optimize</key>
+                <false/>
+                <key>others</key>
+                <string></string>
+                <key>verbose</key>
+                <false/>
+                <key>with_terminal</key>
+                <true/>
+        </dict>
+        <key>Python Bytecode Document</key>
+        <dict>
+                <key>debug</key>
+                <false/>
+                <key>inspect</key>
+                <false/>
+                <key>interpreter_list</key>
+                <array>
+                    <string>/usr/local/bin/python</string>
+                    <string>/sw/bin/python</string>
+                    <string>/Library/Frameworks/Python.framework/Versions/Current/bin/python</string>
+                    <string>/usr/bin/python</string>
+                </array>
+                <key>nosite</key>
+                <false/>
+                <key>optimize</key>
+                <false/>
+                <key>others</key>
+                <string></string>
+                <key>verbose</key>
+                <false/>
+                <key>with_terminal</key>
+                <true/>
+        </dict>
+</dict>
+</plist>