hi if your using vista there's an option in windows itself to use 2 screens, its at your control panel/personalisation/display settings (you must have 2nd monitor connected before starting your pc)

if your using xp then i reccommend going to the website of your videocard and download a support program since xp doesn't like it when u connect 2 monitors to your system.

and for fps settings i got a nvidia 9800gtx and i run my main screen on 55fps (22"wide) and my 2nd on 30fps (17") if you got any slower model videocard i reccomend lowering the setting on your 2nd screen to 15fps

btw you can set the fps in keyclone