Optimized settings for a dedicated game-server?

[gst]

This is not a question on how to get this and that game to run, but how to optimize the settings to get a fast and stable server.

I have a machine with a P3 600Mhz cpu and 512Mb ram which I plan to use as a dedicated Quake 3 server. No fancy window manager
or other things than the most necessary to get it running and remotely login with ssh.

What settings should i put in make.conf, CFLAGS and USE, to get the most out of my machine? Stability versus speed?
I want a lean, mean game server!

Which kernel should I use?

How big does the swap need to be?

What filesystem should I use, ext2, ext3, reiserfs?

When the installation is complete, is there any services that doesn´t need to run that I can disable to speed things up?

Any other tips?

Damn, many questions!
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