RJ shortcut is a pain. I got some icons working on a homescreen I made a while back, but they didn't have the right size selection boxes around them. For some reason, it gets goofed up by third party icons and uses the wrong size for them. If someone can figure out how to correctly use home made icons with RJ shortcut, we could definately do this. Otherwise it would be pretty ugly.
To see my xp desktop theme using RJ shortcut,
click here
Each of the icons is actually a row of icons with one icon per row. You could have up to 10 in an 'mru' style per row. They are permanent as well so it would work. If you follow the instructions i provided and install xp desktop, you'll see how if you move down and select each icon it is weird.