Hello, just thought I'd mention these two titles since they aren't in the compatibility index. The Dark Spire kind of works... it doesn't display all the info in the menus though (and the town screen is pink and green), and classic mode (black and white wireframe) doesn't function very well - it just flickers a lot. However, you can move around and do most of the stuff as far as I can tell (although the quick map doesn't work, which is odd, because navigating through the menus to the map works just fine). Below are some screenshots:

Wireframe Issue:

Town Screen Issue:

Missing Info in Menu Issue:

As for ninja gaiden... it doesn't work very well at all. You can't move the characters around and while the 3d models load, the environments don't quite fully load - instead you get a mostly grey screen.

Edit: Oh yes, I'm using the Windows port and version 0.9.2 w/ SSE2 on XP Pro sp3.
Edit2: And both of these titles run smoothly on my system, btw (x1800xt 256mb 2 gig ram athlon 3800+).