This

is it possible to add ladder runewords when u play 2 peeps in singleplayer mode?

yes

hmm, when i fixed hamachi it seems like i cant join my opponents when they host a game, but they can join me when i host? how do i solve this?

Firewall problem

i read this '' We eventually found out the cause. His install didn't setup hamachi network properties correctly, ipv4 connection was disabled by default.
How did we found out? An online guide about hamachi mentioned this setting on the thirtieth-something point. Me and my buddy were like F@#&CK! :D'' on someone who had the same problem how do i activate ipv4 connection for them if so?

I sometimes play with a mate. We used hamachi for years and i couldnt join his games anytime.. then we started to use tunngle and i still couldnt join his games...
He then changed something in firewall or diasbled fw and restarted pc and now i can join...

Tunngle >>>> hamachi
No process autostarting, easy to setup. But quick free registration required (random email needed)