I allready played some instagib. you can download it here

From readme:

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Instagib v0.2 for Quake IV

WWW: http://www.gibbed.org/instagib/
IRC: irc.quakenet.org - #q4instagib

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I read on esreality that changing r_singlelight to the correct number for every individual map will give you a huge FPS gain. The only thing unfortunate is that modifying is cheat-protected If only the servers could enable it. I read the people with "lesser" cards (e.g. Geforce FX-card) ar...