The thing that gave me the most fps was the hardware sound acceleration thing in the readme..... says this since i cant be bothered linking to the countless threads of it....
4.2 Reducing CPU hit for audio
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Some sound cards and drivers can have a detremental effect on the performance of the game. When you have no hardware acceleration available or selected in the audio menu, windows will be mixing all the sounds for the game in software. This can reduce the speed of the game considerably. You can adjust windows audio system settings in the windows control panel.
*In windows 98/Me look at Control Panel->Multimedia->Advenced Properties->Performance
*In windows 2000/XP look at Control Panel->Sounds and Audio Devices->
Speaker Settings) Advanced->Performance.
Here you will find two sliders. The top slider is the amount of hardware acceleration windows will try to use for the sound. The bottom slider is the output quality of the sound.
If you put the top slider to "Full" windows will try to use all the features of your sound card. i.e. hardware acceleration and EAX (if supported). If you put the slider all the way to the left windows will use a very basic way of creating the sound. (On some machines this will not replay the sound correctly in the game). If you are having problems with the sound try adjusting this slider until you find a satisfactory result.
The bottom slider is useful to adjust the sound reproduction quality. If you do not have any hardware acceleration available in the game you can adjust this to use less CPU time at the expense of sound quality. In windows XP the default value for this slider is "Best". This will render the highest interpolated quality sound (at a high CPU hit). Reducing this down to a lower level will help to ease the CPU hit significantly and therefore speed up the game.
Kev