This is some seriously cool stuff, Moogly! Thanks for your tenacity. I really really wish I had time to assist, but I know it's in good hands.
I've always been curious about the (subtle?) differences between GL and OpenGL, and it looks like I'll be learning through your efforts soon.
I googled around for where to find Alias PowerAnimator Irix install media, and it seems the folk at http://forums.irix.cc have a lot of software uploaded to a private'ish FTP. Looking forward to when you're comfortable enough with the driver to tell them about it and let those flood gates open!