I found out I was in error, sorry guys. It is reporting the full 4gb in System Properties (does it normally do that?) but Everest Ultimate gives the real story, sorry about that false alarm.
Wasn't Sp1 supposed to fix the sleep/hibernation problems Vista had?
I have my computer on no sleep or hibernate only turn off display but still sometimes the same problem occurs (it wont turn back on even though fan is on and u can tell the computer is on).
Only thing that i can think of is that my advanced power options are to turn off hard disk after 20 minutes of no use, so the problem may be from there.