Is turning a x800 pro into an x800 xt possible?!?!?

[Soccerman06]

I have heard of this weird phenominom (i cant spell) that someone had turned a x800 pro into a so called x800 pro xt. The rumors said that it took him no more than 2 hours and when he was done, the window that shows info on the video card said had said he made the normally 12 pipeline x800 pro into a 16 pipeline pro (xt?).

So, the question is: is this possible, how difficult, and is it worth the risk of lossing a $400 video card?