Yes, but some of us (including me) have actually experienced performance loss...
Whoa, really? I downloaded Detonator 4/XP on my parents Dell 450 MHz PIII with the Nvidia TNT1, and I noticed a slightly better performance advantage! (pretty nice considering the XP driver is meant to boost the GeF3's performance the most). What card are you using, performance should not go down noticably, if at all (I saw a couple of reviews that had performance decrease with the XP drivers, but it was literally under 1%, and only on one benchmark).
Anyway, back to the topic at hand... go to
this link to download the latest Detonator drivers for Windows 95/98/ME or
this link if you have Windows XP/2000
guywithoutaclue.