Second post in this link has a nice pic of what the two connectors/cables look like.http://perspectives.com/forums/viewtopic.php?f=17&t=171710
If the optical drive is IDE, you can add a SATA DVD burner to your build for about $15-$20.
If the HDD is IDE, it's probably not worth salvaging. But if you absolutely want to, you should be able to get a PCI IDE controller card for about $15-$20, which would let you plug in both your optical and HDD (one master, one slave).
Edit: Just realized you're not getting a new SATA drive. If both drives are IDE and you go with a IDE controller card, you're going to have problems burning CDs/DVDs. The computer can only talk to one IDE device at a time if they're on the same cable, and most cards will only let you plug in one IDE cable.