Mouselook?

I'd like to use my mouse to look around... but I wonder if that option doesn't even exist. What made me wonder if it might was that there is a keyboard bind for "free look", which is normally bond to keypad 0 by default. In game, however... this seems to do nothing :\

I'd hope to have a little more control over where I'm looking in the game, heh.

The game does support TrackIR if that interests you.