if you've played around with the settings for a single monitor (resolution, etc.) you shouldn't really have a problem setting up dual monitors. the options are in the same place for single and dual monitor support, i.e. display properties > settings tab.
that will get the basics done for you anyway. there are other things you can play around with but the process of plugging a second monitor in and getting it to display is quite simple.
beyond that there are other features that you may use like sending windows to different monitors by using the 'nview' options.
the only other thing i'd point out is that there is a little program that lies hidden away in the nvidea program folder that allows you to set various configurations for monitor views. this allows you to quickly turn on or off the displays and change a few other settings. unfortunately i can't remember the name of it as i'm away from my home computer at the moment.
i'd just plug 'em in if i were you, i'm sure you'd have it all working within a few minutes.