Something is weird with THG forum. First I see that I posted twice and when I erase one, they are both gone. Ah well.
I know that there is not hibernate page in bios, but maybe there is something that is disabled (like going to suspend mode or something). Deppends on the bios. But try in Win Xp control pannel/power options properties/. Do u have the hibernate menu? If not, try at advanced/power buttons to set the sleep button for hibernate (some other options are: do nothing, sleep, shut down). If you don't have hibernate in there than almost sure there is something in bios that needs to be changed. Check out the mobo manual.
Romania is a beautiful country, unfortunately it's inhabited.