Screen effects

[FlawlessHappiness]

What you're thinking of must be
FadePlayerFOVMulTo(float afX, float afSpeed);

That is pretty coded into the system.
I use it to make a "dizzy-effect" where it slowly zooms a little bit in, while the player tilts his head, then zooming out, and head tilts the other way.
FG used it in the 00_rainy_halls. Pretty nice effect