Below are links to articles on Apple-Developer site related to porting CodeWarrior/PowerPlant to XCode and Universal binary on Mac OS X
http://developer.apple.com/documentation/DeveloperTools/Conceptual/MovingProjectsToXcode/index.html
http://developer.apple.com/documentation/MacOSX/Conceptual/universal_binary/universal_binary_ppob_a/chapter_954_section_1.html
