blah.
I'm having trouble connecting to games over hamachi now i've bought the game, my exe doesnt match that of the hosters.
As mentioned that'll be due to downloaders using it to get a game using illegal copies.
Just use the chat window to communicate, make a game and tell your buddies the title. Easier said than done though. I'm hoping by the end of next week the connectivity will be much faster. Even though they've stopped the pirates from connecting, the servers are still horrendously overloaded.
I've ended up using Hamachi for multiplayer due to the Impulse multiplayer system being buggy and slow to say the least
Looking around on the forums, a ton o' people recommend http://www.gameranger.com/ as a good hamachi/garena alternative..