Dude, that's a real old article on unlocking the old palomino core XP's and has nothing to do with unlocking a present day manufactured Tbred or Barton core XP. There have been numerous attempts made to unlock these newly locked XP's by people far more experienced than you or I with no success whatsoever. The only unlocked XP processors being sold now are the mobile XP's. If your 2500 is presently multiplier locked, then you are just SOL with that proc.