[Bungleau]

If it's the only device on the ribbon cable, you can set it to either master or leave it blank (by removing the jumper), I generally set it to Master. There should be either a picture on the CD-RW showing how to configure the jumpers, or there should be some letters visible near the jumpers themselves. MA = Master, and SL = Slave. Avoid CS if it's there.

If the CD is not being found, check all your cable connections. That means the one to the back of the drive (little red strip should go towards power), as well as where the cable mounts on the motherboard. I'll often pop the cables and reseat them to ensure I've got a good connection.

Failing that, does the CD actually work? Can you open and shut the door and so on?

Well, there's a start anyway...