When I installed a new HD in my friends desktop, I didn't fool with the bios at all. I just installed it along side the existing drive on the SATA (IDE should be the same). Then you have to go into the disk manager in windows to format it otherwise, the system won't see it at all. Follow this:

Start>control panel>administrative tools>computer managment>disk management

You'll see a list of all the drives on the computer including the new, unformatted one. Right click on the new drive and select format to begin the formatting process. When it's done, the drive will be ready for use. You can also assign it a letter at this time.

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-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250