Nice, those Ultra 10's were worth a nice chunk of change when they were new. They still command a fair price even today, $50 is a pretty good deal. It's good that you got the Keyboard/Mouse, they can be really, really hard to source sometimes.

If it has another Video card installed, it should treat this additional card as the Primary Output, so I'd figure it'll output from the Creator 3D card. The Rage Card should still work, but be secondary....