When playing online, I don’t see any servers.

I don't know how to do it on Vista, but I think it's not more complicated.

You're right, Evgeny - it's even easier in Vista, although it's a bit clunky.
Step 1: Go to the Network and Sharing Center.
Step 2: In the Tasks column, click on Manage network connections.
Step 3: Click on the Advanced menu item.
Step 4: A drop-down menu will appear; click on Advanced settings.
Step 5: In the Connections window that appears, select Hamachi.
Step 6: If Hamachi is not the first in the list, a button with a green upward arrow will be available. Click it until it becomes unavailable. This means you have reached your goal. :)
I hope this helps someone - I don't know how to write it in more detail. :)