Okay I'm at work and was wondering what's the best way to update stat blocks for the 3.5 creatures/npcs to be more in line with pathfinder stats?
Easiest is to just add the simple advanced template to everything. However, for crown of the kobold king i just added a class level to each of the kobolds depending on their role. It wasnt hard and had a bunch of generic stat blocks for adjusting on the fly.
Depends on the creature. Most of the stuff in 3.5 modules have entries in the pf beastiaries at this point. If the CR is a little off, the advanced or young templates work wonders. Class levels usually just need some rework against the pf class rules and 1 additional feat. Or somewhere in the published books it was recommended to calculate 3.5 encounters as 1 CR lower and let it fly.