jayderyu, that sounds pretty much what I was thinking. I"ll have to make some design changes to accommodate the mouse, like crosshairs and some small changes to the vehicle movements, but it might work.
megatronx, context sensitive controls is a good idea, but just about everything can be used at any time. There really is no situation where one thing is relevant, while something else isn't.
I'll post my current build in the WIP forums tonight and link it here as it's probably easier to play than to describe how it plays.
I see. Don't know what your game is, but maybe a "hold to toggle" button would do; something sequential?