Here is a cut and paste from the readme file S2U2 v1.22 (9-9-200
by A_C at XDA. I take no credit for this. I am only pasting this from the read me file within the program itself.
Thanks A_C.
Q. How to change wallpaper?
A. Create a jpg file with resolution the same as your device (QVGA is 240 x 320; VGA is 480 x 640); rename it to "wallpaper.jpg"; copy it to the gfx folder (default is \program files\s2u2\gfx\); restart iLock2. And the file "wallpaperL.jpg" is for the Landscape mode.
Q. My GIF wallpaper does not shown?
A. Currently, there seems to be a limitation to the size of the GIF file. Sometimes, even your device has enough free RAM, it still cannot be shown. Recommended to reduce the dimension (not the file size) & the no. of frames of the GIF, then try again.
Q. The GIF animation stopped after a certain period?
A. Turn on the GifEndless option.
Q. I've set up a folder of GIF files & set the Wallpaper point to that folder, but S2U2 shows nothing?
A. Wallpaper(L) folder only supports JPG files.
Q. When the wallpaper is set to GIF file, even a small one, the memory usage is very high?
A. Yes, all the frames need to be cached in memory. So the more frames the GIF has, the more memory will be used.
Q. Is it possible to always show the large battery as wallpaper?
A. No, the large battery only shows up when external power is connected.
Q. How to disable the large battery even when external power is connected?
A. Delete "battery1.png" under \GFX folder, restart iLock2.
Good luck to you.