Right this is a weird bug but when running the FPS limiter in New vegas it works perfectly. However when I run the same FPS limiter in Fallout 3 FRAPS is telling me it seems to be pushing my FPS above my refresh rate instead of the FPS I clamped it at.

Fallout New Vegas pre FPS limiter : 40-50FPS Fallout New Vegas post FPS limiter : 40FPS
Fallout 3 pre FPS limiter : 45FPS - 60FPS Fallout 3 post FPS limiter: 50-65FPS

Can anyone tell me why it is doing this?

FPS limiter set to 40FPS in both games**

*ok I sorted it for some reason the limiter changed some random .INI file and it was clashing or something :S