Ok, which is the best driver/opengl combination for a voodoo2 to gain the biggest framerate in CS 1.5? And secondly, is there any way to sli more than 2 voodoos? Let's say 4, but what are the hardware and software mods that should be done?

Quoteis there any way to sli more than 2 voodoos? Let's say 4, but what are the hardware and software mods that should be done?

I would answer : Quantum3D

QuoteAnd secondly, is there any way to sli more than 2 voodoos? Let's say 4, but what are the hardware and software mods that should be done?

Possible? Yes
Worth it? No
Only in Q3D will you be able to do this, within any lines of reason (perhaps, with lots of work, research, and testing, you could build a control board like the Q3D lock for Obsidians, but it would not be worth the time/effort)

Quoteis there any way to sli more than 2 voodoos? Let's say 4, but what are the hardware and software mods that should be done?

Link 2 (or more) Q3D SB200's together with a swaplock cable.
Since a SB200 owns 24 mb of memory... but you will not get more high resolutions but more antialiasing.