Help please, double monitor

Hello,
i have a question, i just got a new television. and i still have my old monitor.
I can duel screen and run both screens at the same time with my geforce x8800 gt.
now what im wondering is, if its possible to get another keyboard and another mice and then be able to play 2 people on the same computer. Using 1 screen each to play, and having 1 mice and 1 keyboard each.
Is this possible ? i current run with vista 64 bit,

My computer is a 3400 mhzamd 64

2056 ram,

geforce 8800 gt,

hope someone can help,
thank you