I spent most of a day trying to do the same thing you're asking LNMoton & getting really annoyed. (There's a thread about it here somewhere). I found a template for sizing & made all sorts of different sized graphics & never could get it to work. Came close, but not quite right. So, I tried MultiPicture, which did work, but I was also concerned about battery drain. Don't know how bad of a drain it might be - I noticed a little more drain, I think - but didn't try it for long. I just see no reason to run live wallpapers if I don't need or want to...
Soooo.... I moved onto other things for a bit & installed my alternate launcher, Launcher Pro, & ended up accidentally figuring out the wallpaper thing in the process. Hehe. LP has an option to disable wallpaper scrolling, which works perfectly. All you have to do is check a box in preferences. So, if you happen to use, or want to try an alternate launcher, you might consider that. I'm not sure if other launchers have that option or not, but LP does & does other useful things as well. Just a thought.