I suggest you get DXDLL (Search OFP.info's news for it). Then run the configuring program (In OFP folder/DXDLL/COnfig.exe or something very similar)
Disable Post Processing, and a few other things like that.. Everything except handle PrintScreen button.
I find show FPS handy too, but it's not too great for screenshots (They show up on them.. It's small, but it's there..)
Also, DXDLL can remove the HUD if you press the App Button (Mine's is right of the right-most Windows button.. It goes Space bar - Alt GR - Windows Key - App Button).. App Button and U, it toggles the Disable-UI..
It removes the crosshairs, ammo counter, etc, and it also seems to remove the lens flare and a few other things like that.. Kinda minor in most cases though.
As far as I've seen, DXDLL works with almost all grpahics cards if you disable postprocessing.
- Ben