Using IP from a different machine to run server

[Hiluuoi]

I`m running a server between my friend and I. The problem is, my connection tends to cut out often but he isn't good enough with computers to set it up on his laptop, plus I want to be able to modify things and play around with it whenever. I want to somehow use his IP but still run it off my computer, how would I do this? He has hamachi set up and I input his hamachi IP everywhere I would have put mine but I get a logon server down error when I try to login. The server works perfectly (aside from my bad connection) when I use my hamachi ip.

[Confucius]

It's not possible as far as I know