What really sucks is that I didn't research the RAM issue at all while building it... Thank goodness Newegg has a great return policy. We had ordered Mushkin ram at first (2 sticks of 1 gig ram) but found out that it wasn't supported by the board. Had to got to ASUS home page and figure out which 1 gig sticks would work and were supported. And now, ASUS has changed that page so I can't find it

Oh yeah, when building it for my son, I was thinking that we wouldn't have a ton of stuff on it, so the smaller but faster hard drive was deemed cost effective. Now they are dirt cheap. I have learned my lesson well on that, I'm going to get the more expensive and larger hard drive, since everyone in my family (son, mom and dad, sister and here kids) love to send and install games on his computer.
So things to fix on my kids computer:
Hard drive--up it to at least the 74 Gig Raptor or 150 Gig Raptor...having learned my lesson, I'll spend $295 instead of $155.
Memory--oh man, this is the most confusing part...I am running windows XP Pro X64, so I really would prefer to have 1 gig sticks that work great as 2 gigs or 4 gigs. Currently it has CORSAIR XMS 2GB (2 x 1GB) 184-Pin DDR SDRAM Unbuffered DDR 400 (PC 3200) Dual Channel Kit System Memory.
Graphic cards update--can be pushed off till later.
Right now it still rocks, we just have to decide what games to delete if we want to install anymore big ones (have about 9 gigs left on the hard drive).