Remote NT Connection

Looking how to setup a workstation that is remote and has its own ip threw a proxy server so the ip on myside is differnt then the local machine (ex machine is 10.22.0.1 the machine pings me it shows up as 12.27.82.1 ). This machine is not part of aDOMAIN server it is by itself. How do I allow access into our domain so they can run the network neighborhood and printers as if the where inside the company.
I have NT server 4.0 running as primary Domain controller and a Cisco 2501 router