I just upgraded my brothers computer to a new MOTHERBOARD+processor, graphic card, and memory. The motherboard only supports SATAII harddrives and I remembered wrong that his was actually two IDE harddrives. So I went to Frys and the guy said there's a card a PCI card that you can plug in the IDE harddrives into and it switches it into SATA. Here take a look http://siig.com/ViewProduct.aspx?pn=SC-PE4B12-S4. The problem is that when windows GETS to the loading screen it just pops up a REALLY brief blue screen of death and then it just restarts. I'm pretty sure I plugged in everything I don't know why it won't work.

ASUS P5KC motherboard
Intel core 2 duo processor 2.66ghz
EVGA 8600GT
2gb corsair DDR2 RAM
If the HDD had an existing install of XP on it it doesn't have the drivers for the card to work properly...

You may get lucky with a repair install of XP.

Repair Install of XP

I suggest reading it thru to get familiar with the procedure first and printing out a copy for reference.
If you have not done so yet i recommend hooking up the drive as a slave in a working machine and making a backup of all your data...I see, but it looks like the PCI card is working because it shows up in the bios and the card detects the harddrives hooked up to it. I tried hooking up my old harddrive to it, because it had windows 98 but it, FAILED to load because of not enough memory even though I have 2gb. I'll try to install the drivers and see what happens. Thanks./The BIOS doesn't need drivers to detect a device. The OS does though.