It's going to be quite a task to get a back up of MSN's database for the MSN Group thing. MS would probably never let you get a copy of their database for any reason. Also, I'm fairly sure that the majority of MS sites are based off of ASP, not PHP, and do not even use MySQL, but probably MSSQL. You'd have to go through a lot to get that all set up correctly.

Good luck, because so far it looks like you're screwed over.