e macresource.need() to open the W resource file in the application init
code (if it isn't open already).

PythonIDE still opens the resource file "manually" because it also uses
presence of the CURS resource to determine whether it needs to adjust
sys.path.
diff --git a/Mac/Tools/IDE/Wapplication.py b/Mac/Tools/IDE/Wapplication.py
index ec0071f..27613f2 100644
--- a/Mac/Tools/IDE/Wapplication.py
+++ b/Mac/Tools/IDE/Wapplication.py
@@ -7,6 +7,7 @@
 import traceback
 from types import *
 from Carbon import Menu; MenuToolbox = Menu; del Menu
+import macresource
 
 if hasattr(Win, "FrontNonFloatingWindow"):
 	MyFrontWindow = Win.FrontNonFloatingWindow
@@ -19,6 +20,8 @@
 class Application(FrameWork.Application):
 	
 	def __init__(self, signature='Pyth'):
+		# Open our resource file, if it is not open yet
+		macresource.need('CURS', 468, "Widgets.rsrc")
 		import W
 		W.setapplication(self, signature)
 		FrameWork.Application.__init__(self)
diff --git a/Mac/Tools/IDE/Wminiapp.py b/Mac/Tools/IDE/Wminiapp.py
index 3ebd226..e09e334 100644
--- a/Mac/Tools/IDE/Wminiapp.py
+++ b/Mac/Tools/IDE/Wminiapp.py
@@ -8,7 +8,7 @@
 	
 	def __init__(self):
 		from Carbon import Res
-		macresource.open_pathname("Widgets.rsrc")
+#		macresource.open_pathname("Widgets.rsrc")
 		self._menustocheck = []
 		self.preffilepath = os.path.join("Python", "PythonIDE preferences")
 		Wapplication.Application.__init__(self, 'Pyth')