In P38L today, landed w/ one engine out. Tried to steer while taxi-ing on the runway. Full opposite rudder and was still going in circles if I didn't have throttle at almost zero.
That problem as been around since the P-38 was added to the game. Basically, if you don't have enough forward momentum when landing with one engine, you'll go around in circles in the direction of the working engine.
If you move the throttle so that you're barely moving forward, use full rudder in the direction of the dead engine (also, if you have them mapped to pedals, toe brake on the side of the dead engine, i.e. dead right engine - right toe brake) and once you start to turn in the circle, cut throttle and stomp on both toe brakes to stop. start over from the beginning and repeat until you've got the nose of teh plane on concrete and exit out.
It's a major pain in the bellybutton to do and I would just recommend exiting out of the plane if you do not have sufficient forward momentum to stay on the runway when landing with a single engine.
ack-ack