i'll give you the instructions i wish i had the first time i installed another drive.
1. turn off the computer, unplug it from the surge protector or outlet.
2. open it up.
3. unplug your CD-ROM from both the white ribbon and the power supply
4. pull it out of your case and look at the back. look at this picture:
the section between the red and blue is where the jumper is located. on top of the CD-ROM, there's sometimes a diagram showing you where to put that little piece of plastic to set it as master. if not, look on the underside of the CD-ROM right where the jumpers are. usually, it will have a few tiny labels that say "master", "single" and "CS". you want to put the piece of plastic where it says master. if it's already there, don't worry about it... but usually it'll be on CS or positioned in some really strange way.
5. for the DVD drive, do the same as above, but set it as SLAVE instead of master.
6. put both drives into the computer and plug both of them into the same wide white ribbon. there should be multiple connectors on the white ribbon.
7. plug both of the drives into the power supply.
8. screw the drives in and make sure they're secure and won't move around if you move the computer.
9. put the case back on.
10. boot up and if you have Windows XP, 99 times out of 100, it will recognize the DVD drive and install it automatically.
That's all.
Brian
PS- that link to that page he gave you above has a better picture. this one, right here:
