How to play Heroes of Might and Magic III online via Hamachi?

Hello everyone! Hex, is there any "Hamachi alternative" for Windows 98?
It's a real problem – Windows 98 is installed at work...

Added 3 minutes later

I downloaded Hamachi, and it gives some kind of error when configuring. It says that the firewall is blocking the port. Although, I actually turned off the firewall. Can you tell me what it is?

Did you disable it in the services?
Go to: My Computer - Control Panel - Services
Find that thing, select properties, disable the firewall itself, and disable the autorun.