custom XMB plugin help, how to change background?

how do I use this program to change my background?

http://pspupdates.qj.net/Custom-XMB-Plu ... /aid/94543

I renamed my wallpaper to 01-12.bmp and saved it as 24 bitmap and it still won't show up??

go here for instructions...was right on the link i gave you to this program
http://forums.qj.net/f-psp-homebrew-dis ... 10000.html

I just went under photo in the main menu and it gave me the option to change it.