I really appreciate the effort, but I explained it incorrectly. I guess what I meant to say was: edit the desktop wallpaper down to 640x1136 and add the translucent white bar to the top like in the 640x960 wallpaper.
Sorry to be a pain. I know you're doing me a favor. Thank you again!
no worries, here's another stab at it. hard to cram that wide desktop picture into a narrow iPhone picture and have it look good. maybe someone else here can try their hand at it...