Navigate to the picture you want as your background and press the menu key, you should have option to set it as the Background or something along those lines. I am not sure on the exact verbage.
__________________
8830 -> 8330 -> 9550 -> 9650
Just think about how far BlackBerries have come from then till now... And what else is coming.
I don't have the capability of hooking up my Micro SD adapter to my computer (security issues at work). So, how do I take the files off the SD into the ringtones and My Pictures section???
When you put the pics on the card, did you put them in the BlackBerry>Pictures-folder? If you did you should be able to see them, if you didnt...do so.
When you insert the SD card into your blackberry, it's creating new folders ("video", "pictures", "music", etc), you have to put the pictures into the "pictures"-folder, the music into the "music"-folder and so on, otherwise you won't be able to see and use them on your blackberry.