VAXstation 3100 and DecWindows

I have recently restored a VAXStation 3100. The 200Mb drive was replaced by a 1.05Gb (that's the biggest boot drive size) I made up a cable to connect a colour monitor to the 15Way plug on the 3100. Switch on and it ran the diagnostics and gave the familiar three chevron prompt. T 75 reformats the drive. (takes forever) I used the second drive position to connect a RRD-42 CD drive and booted I then loaded VAX-VMS 7.3. So far so good. It works just fine. Now for my ultimate goal; load and run DECWindows. I ran the install as per the manual (that's a book that tells you everything you don't need to know and nothing that you do). It completed. I then ran the IVP as per instructions. Its at this point that the book is a bit ambiguous. its not clear how to tell if the system is a work station or a server and how to start up DECWindows from a VMS $ prompt in either case. If anybody has installed and run DECWindows on a 3100 under VMS 7.3 I'd be very pleased hear how they did it from the point where DECWindows was installed. Rod Smallwood