I just love this program. I tried playing around with the textures used as a background for the 'All Programs' and the Start 10 menu.
Using your provided texture called 'img104' as an example - that file is 1920x1200 . 96dpi, 24 bit color.
So I created a file that exact size and characteristics. But when I try to use my file, only a small portion of the file gets displayed on the Start 10 screens. I tried it multiple times - just can't get it to work.
It's driving me a little crazy, because it seems so ... illogical.
What am I doing wrong?