i want to add a background to my f900bt is it possible and how do i do it?

Dude....look in the owners manual...it's very easy....

Or do a search on here....there are threads galore that will give you step by step instructions on how to make one and the manual shows you easily how to upload it either via a Flash drive or an SD card....geez

If you're referring to the opening screen when it first powers up, yes you can change it. Create a "Pictures" folder on either a usb stick or SD card, take whatever background you want (make sure the size is 800x480), go to system settings, splash screen, import from _________.

If you mean the black background on the user interface, you can do that too, but it requires some hacking. You need the image.res file in the APL directory, and it's the first .bmp image in the common subfolder.

ok i tried this with editing the image.res and it didnt work...when i loaded up the radio it froze at the splash screen....please help