I have not worked with AppleTalk for years, but from what I remember there is no AppleTalk protocol listed in the list of available protocols. You add the Services for Macintosh in the services tab of the Network config screen.
Once you hav installed these services, you can configure the properties of the AppleTalk protocol through the properties of the Services for Macintosh.
Look at this extract from a Microsoft article relating to Macintosh services and AppleTalk:
The AppleTalk Protocol is the component of Services for Macintosh that can be configured using the Network icon in Control Panel. AppleTalk Protocol is a stack of protocols that Services for Macintosh uses to route information and configure zones. It works behind the scenes to ensure that computers on the network can talk to one another.
Starting the Configuration:
You start configuration of the AppleTalk Protocol from the Network icon in Windows NT Server Control Panel.
To get started
1.In Control Panel, click Network.
2.In the Services tab, select Services For Macintosh and click Properties. The Microsoft AppleTalk Protocol Properties dialog box appears.
Configuring AppleTalk Protocol:
You use the Microsoft AppleTalk Protocol Properties dialogbox to select a default network from a list of adapter cards bound to the AppleTalk Protocol, and to enable routing and seeding of the network, which include configuring zones and setting network ranges.
End quote.
I hope this helps you.
I don't know why the protocol appears in the list of available protocols in your friends server.
Good luck!
Regards.
Duwane