I don't know anything about coding, but still would like to participate, I've made a visual style for WinXP recently, and I want you guys to check it out - maybe you'll find some ideas useful.
This style is actually a vista mod, and the only things that I did myself are buttons, window decoration and start button.
Here are the screenshots:


You can download this visual style for XP here:
http://rapidshare.de/files/23910765/Rea ... e.zip.html
BTW, how about an OSX-like dock app for ReactOs. I think it is extremelly convinient. This can be a great answer to vista's sidebar. It will replace quick launch. Trey and system icons from desktop (My Computer, My Desktop) can be moved there too, thus making interface clearer and less crammed.