What I had to do was buy a gamepad with a left and right thumbstick. I bought one for $18 at Wal-Mart. The left thumbstick controls Indy and the right thumbstick controls the scenery. I now can control Indy perfectly. If you push the left thumbstick up a little Indy walks and if you push it up all the way Indy runs. The PC game is like this because it was a port from the X-Box version.
My dream, to watch Imperial ships explode in my gunsights.