The -launch does not work and i can't start more than 1 d3 launcher per computer so i'm kind of stuck here.
I was hoping i could bot in party and split loot to the main account.
You make a new folder called "Diablo III 2", copy and paste the contents of Diablo III into it. You then run http://www.thebuddyforum.com/demonbuddy-forum/plugins/111260-r-yar-rrrixs-yar-fork.html on the Diablo III.exe in the original folder and the Diablo III.exe in the new Diablo III 2 folder. This is how I used to do it before, pretty sure it should still work.