there is a write up on this page, you just have to scroll down a little bit.

the hardest part of the whole thing was pulling back the electrical tape to expose enough of the black wire to splice lol.

there isnt really anything you have to do with the computer. just cut one wire, and splice 2 new wires into it leading into a switch. the writeup has pics included...

*edit - here is the link to the thread.
http://forums.2gnt.com/dcboard.php?az=show_topic&forum=33&topic_id=945&mesg_id=945&page=

i would definately have a tranny cooler installed as well.