How do I generate a GHOST.ENV file for GHOST.EXE?

My institution has a site-wide license for GSS 3.0. Recently, I tried to install it because I wanted to try v12 of the GhostCast server and the GHOST.EXE DOS client.

I was able to install the "Symantec Ghost Standard Tools.msi" which came with the GSS 3.x package, and it unpacks the GhostCast server and the GHOST.EXE client, but, when I try to run GHOST.EXE, it complains that it can't find a valid GHOST.ENV file.

How do I generate one?