It shouldn't bee too hard to do. If you company has a VPN already set up, your boss will need a laptop with a VPN dialer (cisco makes a great one).
He'll just plug into a phone jack, boot up, run the dialer, enter his login name and password and poof! He'll be inside your company's firewall.
Yur tech monkeys will need to configure the VPN client for your boss or tell you what settings to use. You'll most likely need stuff like:
-DNS (Domain Name Server) name
-VPN (Virtual Private Network) number
-login
-password
-protocol (TCP/IP, IPX/SPX, NetBEUI)
-WINS server info
I'm probably forgetting some stuff too, like if you use a proxy server when at the office, you might have to disable it when dialing in remotely.
Of all the muthafuckas on earth, you the muthafuckest.
Bookmarks