I'm looking to change some of the stock icons like mail, facebook etc. I already did this for the bitesms icon with the help of people on the board. They sent me the actual icon files and i used ifile to change it. I assume I would need to find/create my own icons in order to change anything w/o winterboard, correct? I've been looking at threads with everyone's jb home screen and saw a ton that I would like. 
