Fallout NV has 3 .ini's:

Fallout_default.ini (in the game's folder)

FALLOUT.INI and FalloutPrefs.ini in C:\Users\username\Documents\My Games\FalloutNV

They all seem to have the exact same content.

None seems to respond to my changes however, i've tried setting iFPS clamp to 10 to see when the FPS would be fixed to 10 - but no change in-game after editing either of those files (i tried one at a time). I also tried setting the TreeRange to 1, trees are still visible in the far distance, I tried some other changes as well that didn't seem to affect the game in any way.

According to TweakGuides.com it's the .ini in the game's folder you're supposed to change, which i doubt. The game won't even complain if i cut/paste that file to my desktop, and all the settings are unchanged, that files doesnt seem to be needed at all.

So, anyone got any idea which file the game reads? Maybe there's a forth .ini somewhere :cryvaultboy:

(a bit OT, i know..)