Glad you got it working. I ran into a similar, though much less serious, glitch when Rush Attack dropped me under the game world. This was going downhill slightly, starting from the stand by that hellgate thing, attacking the summoned black ring members; I just had to run a bit towards the downhill direction, and I popped back above ground.
Of course I had a recent save anyway, before using anything beside a large glowing globe called hellgate.
Welcome to the forum.
