I scanned through some of that site, it looks like an interesting project to me (when you first said Worldforge, I thought you ment WorldForge lol)...
Like I said above, though, that's a huge download, and if your making anywhere near commercial-quality RPG of that magnitude, you'll be lucky to push it down to 500MB in Artwork... All the textures, models, and so on included, it's simply not technologically possible to shrink it much more than that and keep any amount of detailed quality with that many graphics. (I couldn't find any screenshots of XClient, though, so I have no idea of it's quality)...
If you can get it down below 500MB, and still have everything UO has, well, you can be sure the quality will suck.
Anyway go for it
Looks like fun, but I already have a 3D engine of my own started, and it has a long way to go, so I'll be pretty busy
(Ry has already been making little mazes with my first/second engines, he knows how far they have to go... they are *SAD*)...