I know there is a way to install a PC QIII: Arena on Mac. How?

When it's "installed" (I think you just have to move some files, right?), can you play with PC quakers online. The server selection is getting pretty slim :icon33:
Also, any ideas for this issue: I've installed the os X patch, but when I try to load up optimized Os x versions (either the regular or the G4 specific), I get the Id logo, then a white screen. Uhhh, what?
Last thing. Sometimes, I'll load up the game, go to multiplayer, select internet, and it will load for a while, then say "no response from master server". Weak. But then, the other half of the time, I get the full list of the servers immediately.
I've got a G4 1.25 ghz, maxed ram, and comcast connection.
Any help/information is appreciated
