How to farm on crossfire?

I wanted to farm for my first time ever, I got enough comps but they are my bros n sis so I dont have anyone to farm with, no one in my friends list is online a lot, and they are busy. I was wondering if there was any way for me to farm with 1 PC...

P.S: VirtualBox don't work so..

i THINK u cant farm on 1 pc .. :/

U was able to do that.but x-trap patched it.