you said you were planing on using your old computer. if it has 2 IDE slots on the motherboard, you should go here:
http://forums.xbox-s...howtopic=496263 if you have a newer computer and the primary master is SATA, there is a USB option here:
http://forums.xbox-s...howtopic=690646there is a ton of reading involved. make sure you understand what you are doing, and BACK UP EVERYTHING!!! if infact you do have an older computer. i suggest using the first option as the 2nd one is still buggy.
someone else may have better advice for you, as i am somewhat amature at this. but the links i gave you are sound solutions.