Well, I found out the problem, someone else was right, it was a ram issue. I'm not sure if there's a problem with my ram, but as a last resort, I ended up pulling out 3-gigs of the ram, leaving in only a single 1-gig stick and it's installing just fine. I'll wait for it to finish installing, then I'll try to get that ram back in there
One thing that I find interesting about the actual DVDs is that the dvds are exactly the same in the upgrade and full version kits, the only difference is the key that comes with it, which of course are upgrade and full version keys.