I would look into LogMeIn Hamachi
specifically. Very cool product. It allows you to create a secured private network pretty easily. It just installs as a virtual network adapter using the 5.x.x.x network. You then add/remove other Hamachi users to your network as you see fit. After that, it's all pretty much transparent. Every member can browse that shared network, share files, printers, just as if you were on the same physical network. And best of all it’s FREE.