[RubbleRobble]

I don't know if you have any data on this guy, but in a shorthanded game, I think solid players will call $10 to win $32 pf even if they will be OOP from there on. I think flop should be around 30 (aka 2/3rds to 3/4ths pot), not the full 42 in an effort to not have such a big turn decision. He calls it, making the pot 100 and not 120. That call is probably on a king of some sort, medium strength pocket pair (99 thru JJ I think), or any sort of quality draw. While I'd guess you are ahead, I don't really like the idea of shooting again on the turn and getting put to the test with a check raise, so I'll play along and check behind. River you can call any bet up to about 3/4ths the pot, and fold pretty much most bets that are higher, tending to call bets from non-flush rivers.

As an aside: Get Poker Tracker if you don't already have it, its invaluable at NL200 and above, because there is a higher percentage of regular, solid players in your pool.