If you want to easily set up multiple monitors, this is one program to check out.
I use it with 2 monitors for now, but its not limited to that. I think you can put up to 9 monitors at once ( dont quote me on that ).
eg: 2 monitors, 2 completely separate/independant screens
    3 monitors,  ...same....
more than 3 monitors will either clone 1 of the 3 or blend it as if 2 of the monitors are 1.

If I read some of the options right you can link 9 monitors all together to make 1 big ass one.  

There are more options, but bla bla bla.

The keygen is in the zip file, all worked fine for me and still does.
Try it out, I could be incorrect on a few configurations , I havent tried them all out, like I said I use only 2 for now.

any problems pm or email me...ENJOY