[Bungleau]

Hmmm... sounds like you've got a motherboard with two IDE channels, on each of which you can hang two devices. And if I understand you correctly, you're saying that you can boot fine and install fine off of one channel, but if you try to install something on the other channel, it fails.

If that's correct, do you have a master device on that second channel? One of the two devices must be jumpered as the master, and the other as a slave. Check the back of the drives for the proper jumpering.

In my experience (having built a few of my own machines), I haven't had any restriction on putting hard drives on one channel or the other. I now understand that you should keep similar devices on the same channel, because the channel moves at the speed of its slowest member. So put a hard drive and a CD-ROM on a channel, and they both pass data at the speed of the CD-ROM. You may have a different configuration, depending on your motherboard.

Good luck.