Yeah, I hear ya! You don't hear too often about a CPU getting killed just by messing with the FSB and Multplier. I think it gets killed either from the effects of ESD (only takes around 80 to 300v to kill a chip. If you feel the shock, it's around 3000v and the ones you can see are at least 10,000v) or not connecting the L1 bridges carefully (having the bridges connected with each other) and when it gets powered up, the electricity gets shunted down the wrong path.
I have to say, I was very fortunate when I unlocked my XP1500+ on the first try. It's now running at 1704MHz which is better than an XP2000+ (1663MHz).
As long as you take your time with the unlocking process (I know THG says it takes around 30min), and use a magnifying glass to check the "neatness" and a multimeter to verify the bridges are closed, then you should have no problem joining the ranks of us OverClockers.
BTW, if you get hooked on the speed and crave more, you can join OA (OverClockers Anonymous) at no charge.
GearJammer
qlm tera'ngan!
(Translated from Klingon: Attention Earther!)