do you have one card? or 2?
if you get a second card (like what i got, and put your 2nd monitor on it)
then you will be able to use the second monitor without closing what ever is on the first monitor
i.e. i can play RC Tycoon 3 on one 22" LCD and chat with my friends on Yahoo on the other.
but there is a draw back
my 2nd monitor doesnt have a start bar
so if i need to access anything that is minimized
im SOL
In your NVIDIA control panel go to 'Set up multiple displays'. select the option 'Configure independently from each other (Dualview)'. Then select the displays you want to use. Then select the primary monitor.
If you play games full screen then you will loose the game when you use another application. Play the game in a 'window' and you get to use the other screen for whatever you want while gaming.