I found a newer version of the theme generator here:
http://ppcthemeonweb.benthon.com/ThemeOnWebEn.htm
It's actually a stripped down, online version of the regular software. I haven't tried it yet, but it seems pretty straight forward. The actual download can be found here:
http://www.pocketpcfreeware.com/en/index.php?soft=1523
Be sure to scroll down towards the bottom of the screen, because they list every version of the software, oldest on top. But be prepared to play with it for awhile. I don't think it's a quick learn to get these things to look as good as (V)eGa's.