Need Help Changing Background

[Onida]

Hey guys, im making a theme for my Chipod and this has been a big problem , the background change from ugly purple to white.



i tried everything with s1res or maybe im missing something but looks
like the colors are coded on the fw. i wanna make it white so my ipod theme looks perfect , i already did the menus, logo, and the ending screens, a couple of icons too, but the damn background its a pain in the ass. my chipod comes with 4 colors on system>style setup , but all are pretty ugly . is there a way to change one of those style setup colors to white ? i know it has something to do with the editing the fw through an hex tool, but im not good with that kind of stuff.

please help me 8)
thanks.