The HDD should be on a separate IDE channel from the optical drive. A HDD slaved to an optical drive can sometimes cause problems.
As long as there are no problems with the partition or drive, Windows will have no trouble recognizing it. Set up correctly, it will show up in "My Computer."
As a sidenote, make sure you understand what is being said before correcting someone, eyeCpc. I suggested setting the 80gig IDE drive as a slave using jumpers on its own channel. I suggest slaving it so that changing the boot order in the BIOS isn't necessary. Windows won't boot from a slave drive.