This is the best video I've found. Do it this way and you will never have any problems. Just skin them after before cooking, and you have boneless, skinless fillets.
Just think about conservation and if you are keeping pike to eat, the best size to keep them with the current regs is between 25 (63 cm) inches and 30 inches.
http://www.youtube.com/watch?v=bcWyGrV0qao