After a lot of trial and error, and a complete system overhaul, I got myth 3 working again on my computer. I downloaded the flying flip patch but was discouraged to see two problems:
1. How do I play it multiplayer? I know not many people play it anymore but even for private games I'm at a loss
2. The "medieval" conversion is missing from the Tain. If anybody knows where I can find it (or other cool myth 3 projects!).
Thanks for reading!