tiny wallpaper pics on Nokia 7370?

My son just got a new Nokia 7370 and we have been trying to figure out how to stretch the pics we are bluetoothing to his phone. When he sets one as his wallpaper, they are very tiny and in the center of his screen. These same pics take up the whole screen on my Nokia 6085.

I've searched in the instruction book, and there's no mention of a "how-to" on this subject.

Any ideas?

maybe you can try to make new wallpapers, from a site like Ventones
they let you upload an image and you can cut what part of it you want.
you can even make animated images for nokias

try ventones as he said

Sum time ago i had a craze to do wat you are trying to do now! =)

I tried another website at that time for croping and stercthing! though you ca use ventones as it is the best source nowadays!

I don't know if this will help, but I was trying to get my pictures to take the whole screen up...all i did was choose a random theme, then set my picture to wallpaper and it worked...

try zegde.com,they have wallpapers for all specific phones