I just found this site. Not free, but the 5 second demo looks pretty cool.
It's called upzipping a pike.
http://www.nobonesaboutit.com/demonorthern.html
When I do pike I end up with three pieces per side (top/bottom/tail) but usually end up cutting them into more than five so they fry nice.
BTW, I personally think that a 3-4lb pike landed on the ice then filletted boneless rivals any fesh water fish (maybe even the smallest of walleye).
Prairieboy