Note: Mac OS X 10.6 eliminates the use of creator codes in its Launch Services methods for determining the preferred application with which to open a file. Files are opened based on explicit application associations for a specific file, all files of that type, or based on the file extension.
http://michelf.com/software/magic-launch/
File association manager + you can reinstate creator codes if you need to.
Lame:
http://kb2.adobe.com/cps/511/cpsid_51110.html
Awesome. For years, Mac users made fun of how 'dumb' Windows was for having to rely on the lowly file extension to know what a file was.