It was removed because of concerns relating to the legality of the QPST software required. The guide was only moved offline. Your work isn't lost and the thread can be restored if the forum managers decide it doesn't violate our "keep it legal" policy.
I do understand your concern, but there are plenty of other references to QPST here. Hopefully their guides aren't deleted either. Also, from my understanding, QPST is not illegal by any means. You just have to have permission to use the software. There could be people on this forum with that permission. Just sayin...