I have a similar problem, with a radeon 9000 mobility (not quite newest of new, top of the line stuff, but fine) and 3ghz p4. Looking inside the patch, there seem to be a lot of [text2d] modules, which are the cause of the problem. If you delete (or otherwise stop) the _txtline modules in m/intro, it should work without too many troubles - at least it does for me.
it seems that i have a problem with openGL. i can watch/listen the flyer until the blue lines appear. then i have a cpu overload and the sound gets more and more staccato-like with every new blue line. when all lines appeared, it's very slow (ta-ta--ta----ta---ta-----ta).
I have the same problem. :( Maybe our cards (I use a G450) are just too slow. You can also listen to the song without graphics by just not loading Gem, although that's not a real help...