I've been trying to get PJ 64 (Ver 1.5) to work for a while now using Jabo's DX7 plugin, and it just... won't. I'm guessing it's a graphics card problem, personally.
Anyway. I run a 1 GHz machine (Windows ME -- came installed :\), 256 RAM and... hold it... S3 Savage4 32 Meg graphics card...