I have to return to my linux rig to "remember". There's a config file in your /home/<user>/ folder. Maybe it's the bash.something... anyway, just define which settings you'd like to have on ALL your games. In the config file you should add something like this:
alias export __GL_FSAA_MODE=2
I use three alias: one for FSAA, another for Anisotropic Filtering and the last to force VSync On. Your release notes should be pretty self-explanatory.
If I could just remember the name of THAT file...
Anyway, save the file when you're done, restart X and you're set.
Use the source, Tux.