Help How do I make my wallpaper picture fit ??

[kdkinc]

How do I make my wallpaper picture fit ??
I down load a Pic from my old Omnia i920 forum wallpaper site site.
It 480 X 800 pixel JPG (I can stretch it to get the 54 pixel more if I need it).
When I go to set it as my wallpaper the "crop" square only let me allow 1/2 of the pic.
I resized it way down still no luck.
should I make it a PNG file??

This is the wall paper I'm trying to get....

http://androidforums.com/attachment.php?attachmentid=9134&stc=1&d=1281287107

 

[Paycer]

"View Image Info" - "960px

 

[kdkinc]

"View Image Info" - "960px

 

[angelbaby91277]

on my LG Enlighten, when i crop a pic to save to my wallpaper it only lets me crop so much so when i put more than 2 people in a pic it does have why is this, is there a setting i can do to change the size?