OpenVPN Setup

Tue May 10 20:08:32 UTC 2011

I have a FreeBSD-8.2-STABLE server running OpenVPN. What I'm trying to do is to 
be able to access my LAN with my M$ Windows laptop using a M$ compatible client. 
I read the manpage and it basically sets forth examples in which there will be 
two (2) OpenVPN servers. In my case I will only have one OpenVPN server and my 
laptop out there on the road. And of course I won't know the IP address of my 
laptop until I connect out there somewhere. Can anyone recommend how to do this 
or where I can read more about how to use OpenVPN with only one server?