Hi,
To be honest it is a very easy process, but the bug is it depends upon what you already have on the computer in the way of drives. Assuming that you have an IDE hard drive on a cable alone, then all you have to do is set the jumpers on the drive to Slave settings, and plug the drive into the middle of the ribbon cable. Then put the power plug on it and away you go.
If you have two drives already on that cable, then use the 2nd IDE slot, set the drive to master and put it on the end of the ribbon cable.
If your situation is different than this, please let us know. It would also help if you told us what drives you already have (brand, size, type) and how they are set up on your computer.
Hope this helps....post back if you have questions.