You would do whitefish and trout the same. Get a 6'' fillet knife, fairly flexible, good quality steel with good edge helps. Use this method:
http://www.fishingcairns.com.au/page17-1.html
That will give you the two fillets, bones in, skin on. It works easiest on fish 12-16'', that fish they're doing will be harder than a whitefish. I always remove the y-bones in a strip then use the strips to make chowder. Here's a pike demo, whitefish and trout are much easier.
removing y-bones
http://www.onthelake.net/fishing/ybones.htm
I fillet a ton of fish using that method and it gets pretty quick. Salvage fishing this year (permits in irrigation systems, legal) me and my dad did our 40 in about 1.5 hrs/packed/frozen. End product was enough boneless whitefish fillets for the next year.
Wish i had some pictures of our method, everyone changes it a bit, we gut them first (i think the link did too) but leave scales on, leaving heads on fish definetly speeds it up and gives your hand a place to grip. Rib and y-bone removal takes majority of time.