I've done it once and followed the instructions on here. http://www.360-hq.com/xbox-tutorials-61.html The main thing I did learn is to stay with similar drives by the same manufacturer, so I had a Hitachi and got a new Hitachi of ebay Most of the software that you will require for the Firmware flashing is available at http://www.xbins.org/ It is not hard to do but I found it tedious and a pain in the neck. Best of luck to you