Yes you can. E.g if you put a Bundles folder next to the Icons folder in your theme as such: Bundlescom.apple.MobileSMSDefault.png, your png image will replace the SMS app's Default.png Check the winterboard thread to see the com.Apple.whatevuhhh for other apps.
Last edited by beatoven on August 21st, 2008, 7:10 pm, edited 1 time in total.
Which method did you use? If you used the Winterboard method, it shouldn't have broken. Try re-syncing the app. If you tried image replacement, you probably altered the app's contents. App store apps are a bit like nitroglycerine - jiggle them a little and they'll explode.
If I downloaded a theme via Cydia and use it, and it has custom icons for AppStore Apps, do I still need to go through step 5 to 9 if I want to change those icons? Again, I apologize for such a newbie question
ermm, this is a really old and pre-winterboard process. This process should not be followed anymore as it will more than likely break your apps. I suggest using winterboard for themeing now. If you don't know how to use winterboard, please do a search, as it has been discussed several times. I suggest this topic be locked.