I have a galaxy s2 running Eugene's macnut rom and I want to learn how to theme properly. I've been editing pngs of the battery and status bar icons and I don't know what to rename them and which program is simplier. Any help is appreciated.
It just turns the compiled program (app) into a human readable language.
If your're talking about a photo editing application for your computer then I'd recommend Gimp. It's free and easy to use. If you don't mind using your money then Photoshop would be another choice (I found it more difficult and wasting more time to figure my way around it ROFL)