Go here:
http://www.hamachi.cc/
and download hamachi. Then install it (accept the goddamn unsigned drivers) then run it.
Now join the network TToR-LAN. Password is TToR.
There you go. Just minimize it. Now you should be able to just go into TToR on local area network and join games made by other people who also are using hamachi and a joined to the network. You can also make games yourself, and people in the TToR network can join them. It's as easy as that. Now let's get down to some betatesting!
Oh yes, did I mention it supposedly works even with firewalls?
See you there.