How do I grant su rights to the File Manager app? I'm digging around trying to find a Angry Birds save files but File Manager is lying about what's in each folder. How can I give that app su rights? Can I launch it from the command line after typing su or something?
I'm not sure how you'd do that with the built-in file manager, but there are several file managers that will work.  I use Root Explorer, and I've heard many other recommend Astro File Manager (which has a free version, I believe).  They should work if you have the Superuser app installed (I would assume it comes with CM, but it's in the Market if not).