I understand that - how does it help or not help the OP here?
Are you saying once the O/S has been updated to XP SP1 at least, then the extension entries in the Microsoft article
posted already will help?
As you do not have the uploaded bios image to work with - as it was deleted, you can not see the settings in bios.
I read off it's image of the bios setting, it was one of those cheaper bios firmwares that did not allow all settings the motherboard could cope with - nothing new for this OEM company.--
The only thing necessary for the triumph of evil is for good men to do nothing - Edmund Burke