I am trying to skin the GoodReader icon and the loading page "the retina way". However, I am unable to find the name of the folder/bundle of GoodReader. I could do it the lazy way by creating an icons folder but would prefer to do it the proper way. I did manage to find the GoodReader folder at iPhone in a folder with a string of numbers. I did try to overwrite the icon png but decided not to do so because I want to keep the original icon.

And one more question- what is the difference between bundles and folders? It is a bit hit and miss for me as the icons sometimes is to be placed at the folders and sometimes at the bundles.