The controls in Emperors Tomb were a pain in the butt at first, but after a little experimenting I got the hang of them. As far as I know you can't just turn Indy, just point the camera where you wanna go and press forward, he'll go that way, also if you just barely tap it he'll turn without going too far. Also I recomend the keys where the are to begin with as they are all centered around each other, and are fairly useful that way. Hope this helps you. It really is worth the cash you gotta cough up.
Just because people think what I say don't make sense, doesn't mean I don't like popsicles.