How do you open multiple combat arms on 1 computer?

I searched this but i didn't seem to find any thread and actually answered my question. I want to rank up fast so im thinking of creating 8 accounts, fireteam with them and get lots of points. Or to get medals by vs'ing myself.

I heard something about VMware but don't know how to use it, it also costs money.
Help plz.

Even if you manage to open up multiple games using third-party software, the sheer processing power needed would most likely crash your computer beyond the brink of repair. I'd suggest using more than one computer