I have an 8400 with a 160G serial ATA hard drive running XP.  I have been trying to format the hard drive, but once I boot from the CD windows tells me that I have no hard drive- which I do...  Is there a setting in the CMOS that I need to change so that I can format the HD?  I remember building a friend's computer and I had to go in and tell the machine that it really DID have a hard drive, and after that it acted like a regular IDE HD for formatting.  I can't find where in the CMOS to select the option to let the HD allow to be seen.  OR, is there an additional driver I need to load, after reading in the beginning of the CD boot, "Press F6 if you need to load a third party driver" (Something like that)..... If there is an existing set of instructions please point me to them... or let me know what I am screwing up.  Thanks.