diff --git a/Mac/Tools/twit/TwitCore.py b/Mac/Tools/twit/TwitCore.py
index a4d68bd..8cd8c0e 100644
--- a/Mac/Tools/twit/TwitCore.py
+++ b/Mac/Tools/twit/TwitCore.py
@@ -15,11 +15,11 @@
 )
 
 # XXXX Mac-specific
-ICON_NORMAL=512
-ICON_RETURN=515
-ICON_CALL=516
-ICON_ZERO=517
-ICON_DEAD=518
+ICON_NORMAL=500
+ICON_RETURN=503
+ICON_CALL=504
+ICON_ZERO=505
+ICON_DEAD=506
 
 class DebuggerStuff(bdb.Bdb):
 
diff --git a/Mac/Tools/twit/mac_widgets.py b/Mac/Tools/twit/mac_widgets.py
index 5e39feb..569214f 100644
--- a/Mac/Tools/twit/mac_widgets.py
+++ b/Mac/Tools/twit/mac_widgets.py
@@ -17,7 +17,10 @@
 TEXTFONT=4
 TEXTSIZE=9
 
-PIC_BREAK=513
+# Resource numbers
+PIC_CURRENT=500
+PIC_BREAK=501
+
 picture_cache={}
 
 class MT_TextWidget:
@@ -184,14 +187,14 @@
 				self.terect[0]-1, self.rect[3]-SCROLLBAR)
 		self.curlinerange = (self.terect[1]+self.ted.lineHeight,
 				self.terect[3]-2*self.ted.lineHeight)
-		self.piccurrent = 512
+		self.piccurrent = PIC_CURRENT
 		
 	def setbreaks(self, list):
 		self.breakpointlist = list[:]
 		Qd.SetPort(self.wid)
 		Win.InvalRect(self.iconrect)
 		
-	def setcurline(self, line, pic=512):
+	def setcurline(self, line, pic=PIC_CURRENT):
 		self.curline = line
 		self.piccurrent = pic
 		Qd.SetPort(self.wid)
diff --git a/Mac/Tools/twit/mactwit_app.py b/Mac/Tools/twit/mactwit_app.py
index ed96af5..4b8433a 100644
--- a/Mac/Tools/twit/mactwit_app.py
+++ b/Mac/Tools/twit/mactwit_app.py
@@ -20,9 +20,9 @@
 import string
 
 # Resource-id (for checking existence)
-ID_MODULES=512
+ID_MODULES=500
 
-ID_ABOUT=515
+ID_ABOUT=502
 
 _arrow = Qd.qd.arrow
 _watch = Qd.GetCursor(4).data
diff --git a/Mac/Tools/twit/mactwit_browser.py b/Mac/Tools/twit/mactwit_browser.py
index 5de8716..4c71146 100644
--- a/Mac/Tools/twit/mactwit_browser.py
+++ b/Mac/Tools/twit/mactwit_browser.py
@@ -27,7 +27,7 @@
 import Qd
 import List
 import sys
-from types import *
+from Types import *
 from QuickDraw import *
 import string
 import time
@@ -37,7 +37,7 @@
 start_object = sys
 
 # Resource definitions
-ID_MAIN = 516
+ID_MAIN = 503
 NUM_LISTS = 4	# the number of lists used. could be changed, but the dlg item numbers should be consistent
 MAIN_TITLE = 3	# this is only the first text item, the other three ID's should be 5, 7 and 9
 MAIN_LIST = 4	# this is only the first list, the other three ID's should be 6, 8 and 10
diff --git a/Mac/Tools/twit/mactwit_mod.py b/Mac/Tools/twit/mactwit_mod.py
index eb3d84d..8c54480 100644
--- a/Mac/Tools/twit/mactwit_mod.py
+++ b/Mac/Tools/twit/mactwit_mod.py
@@ -10,7 +10,7 @@
 from mac_widgets import MT_AnyList, MT_IconTextWidget
 
 # Our dialogs
-ID_MODULES=512
+ID_MODULES=500
 I_MODULES_TITLE=1
 I_MODULES=2
 I_VARS_TITLE=3
diff --git a/Mac/Tools/twit/mactwit_stack.py b/Mac/Tools/twit/mactwit_stack.py
index d15f5f9..e38fec3 100644
--- a/Mac/Tools/twit/mactwit_stack.py
+++ b/Mac/Tools/twit/mactwit_stack.py
@@ -10,7 +10,7 @@
 from mac_widgets import MT_AnyList, MT_IndexList, MT_IconTextWidget
 
 # Our dialogs
-ID_STACK=513
+ID_STACK=501
 I_STACK_TITLE=1
 I_STACK=2
 I_VARS_TITLE=3
diff --git a/Mac/Tools/twit/twit.py b/Mac/Tools/twit/twit.py
index 6c6bad4..2cc3f41 100644
--- a/Mac/Tools/twit/twit.py
+++ b/Mac/Tools/twit/twit.py
@@ -20,7 +20,7 @@
 
 if os.name == 'mac':
 	import MacOS
-	MacOS.splash(515)	# Try to show the splash screen
+	MacOS.splash(502)	# Try to show the splash screen
 	import mactwit_app; twit_app = mactwit_app
 else:
 	try:
diff --git a/Mac/Tools/twit/twit.rsrc.hqx b/Mac/Tools/twit/twit.rsrc.hqx
index a6a9a8f..3bc1259 100644
--- a/Mac/Tools/twit/twit.rsrc.hqx
+++ b/Mac/Tools/twit/twit.rsrc.hqx
@@ -2,7 +2,7 @@
 
 :#A4hDA3ZFR0bB`"bFh*M8P0&4!%!N!HdV-5P!*!%!3!!!,)5!!#a%J!!!TS!!!$
 `DIrr)"H6)!!#JH$`Drrr)"H8*!#3"2"[rrmJ#A4hDA3ZFR0bB`)!!!!rN!J!N!`
-rN!J!N"LZUS!V!*!'Y+`!m(Errb!AR%3!N!6`Grrr)"HG5!#3"2"irrmJ&jj-!*!
+rN!J!N"LZaQ0F!*!'Y+`!m(Errb!AR%3!N!6`Grrr)"HG5!#3"2"irrmJ&jj-!*!
 %m(Rrrb!ARe!!N!6`H[rr)"HJ9!#3"2"lrrmJ&k&B!*!%m(crrf!ASP`!N!6`IIr
 r)"HMB!#3"2#!rrmJ&k4N!*!&!rrr)"HPD!!#G#LrK2rr)"G2)!#3"#S!6!"S!AJ
 #'J!%!3!"!*!&!J!99(GTG#!Y)%e[C(9XC5"LFQphFf9b!!!!,`!U!"!"``(8!!3
@@ -922,4 +922,4 @@
 08h4KBfXJBR*[Gh0PFJe6G'&MDb"LFQphFf9b$Ne[C(9XC5"LFQphFf9b"8&bFQp
 h#Q*bC@&VF'pTER3*3@*[GA3JBQpi#8&LEh9d)'*[H!P"BQpeG#"LEhJ16@pNG@a
 P)'*bEhGcCA)08h4KBfXJBR*[Gh0PFJY@BA)JBR*[Gh0PFJj#FQphFf9b)(GTEQ4
-[G`j2GfjPFL"bCA0[GA*MC8aE:
+[G`j2GfjPFL"bCA0[GA*MCF65: