Terminal Services and \etc\services

>We are working with a daemon-like Win2K/XP application that uses
>GetServByName() to get the TCP/IP port to listen on. We would like to
>get it to work with windows terminal services such that if multiple
>terminal sessions are opened, each could have an instance of this
>application running (on the same target machine, of course). In order
>to make this possible, each instance would have to listen on a
>different port.
>
>Now, since there is a single common services file located in
>\WINDOWS\system32\drivers\etc, it makes it difficult to have each
>instance resolve into different port numbers (the service name is not
>configurable).
>
>Is there some way to trick the application to pick up different port
>numbers? For example, if it was possible to change the location of
>the services file to a unique directory for each terminal services
>user, it would solve the problem. Or, if it was somehow possible to
>intercept the GetServByName call... You get the idea.
>
>Any thoughts?
>
>--Joe G.