As I said, this will ONLY work if the flash FROZE during the burn of the early part of the TSOP.
If it completes, or moves past it, you are SOL as all the code will be gone, including the upper bios areas you are trying to fool the Xbox into reading.
So this will only apply where this is the case.
Howeverl at least you can ground the points on the back instead of on the TSOP itself!
Hmm... if anyone does do this, it may well pay to put a switch on it as well, then boot up with the Enigmah enabled (it should work now) and reflash the TSOP properly to fix the original bad burn.
It is an "interesting" fix, when it can be used.