FOSS gamedev and creative worlds

Well when Menche or whatever his name is said about Remobo, I installed and it doesn't work so right now I'm asking if I can use Hamachi since my friends have it installed, so can I use Hamachi for a server?

I suggest using Remobo. Creates a VPN address automatily

You can yes, just the same as Remobo, no port forwarding and so on.