They have a fairly detailed what to do over at the forums on xbox-scene:
http://forums.xbox-scene.net/lofiver...hp/t91520.html
The biggest problem will probably be finding the actual video switch disk file.
This page has some tech details on the file for some quick double checks that you have ended up with the right file(after you find it of course, XDK compiled and all that fun stuff so no direct links from me)
http://forums.xbox-scene.net/lofiver...hp/t50017.html
Since they are refering to just the ISO file, you should be able to just burn that and hope that your XBox drive can read the burned media. (So no worries about xISO, or dummy files)
Hope this helps.