Gaming with Linux, speed up

Btw, here is my configuration (instruction) for games (hardware: my good old Intel Pentium III, 786 MByte RAM, OpenSUSE 10.2, Nvidia Geforce MX2 400 32MByte):
* first do a init 1
* /etc/rc.d/boot.udev start
udev is needed for sound card device creation ("/dev/dsp")
* /etc/init.d/alsasound start
this starts your sound card
* dhcpd eth0
of course start the ethernet network, you probably want to play online
* chmod 0777 /dev/dsp
so you can use your sound card
* X & xterm -display :0.0 &
this starts a X-server, most games like America's Army need a running X server
* with the started xterm, you can start your preferred game
of course you should now change from root user to your day-by-day user
* su yourusername

The noticed performance benefit is overwelming. A nearly empty process table, excellent. So for America's Army v2.5 in runlevel 5 with Gnome the game judders, within the minimalistic it runs fluid. Sadly I cannot provide any frames per second.
But with this, my good old P III is still competive.