Seems that basically any *flashable* LPC mod will work with this. I have no 1.3+'s to practice on, but after messing around on a broken xbox mboard, I can say that this most definately isn't an easy task. My main problem is being able to scrape off the solder mask without making it difficult to see the via properly. The green "film" turns white when scratched, although when I dig deep enough the "gleam" of the metal via shines through. Soldering from this point isn't difficult, but it seems that some kind of strong adhesive is necessary to ensure the wire won't come loose after soldered.
Moral of story: unless you mod a lot of xboxes and want to save your customer's some money (about $25-30 price diff between cheapmod and most commercial chips), don't bother with this.
off topic: has any1 found a corresponding via under the solder mask that links to d0? I have a broken xbox that might be resurrectable if I can find a place to link to.