Hi Andi,
Both VAC and C Set/2 can be installed by unpacking ...
I think the problems start with VAC4.0 and it's help system which needs a server and a lot of settings in config.sys. Think the included 3.65 version needs the 'new' help system too.
You are right in that the Help system was somewhat 'picky/fussy'....BUT...once configured (NetQ app) it is actually a darn good system.
I still have all my VAC stuff installed and configured (working), both the 3.6.5 as well as the 4.0 GUI, although I primarily use the 3.6.5 for compile duties, as the 4.0 GUI stuff always seemed too resource intensive.
Having said that, I did configure a project in 4.0 a few months ago (it was the DISKIO update I was working on) and in a SMP enabled box, with a sizable JFS cache and plenty of memory, boy, that thing absolutely rocked!!!
Anyways, for anyone trying to get that 3.6.5/4.0 Help thing working: if you are stuck, describe the problem and I'll be happy to help - at least we have a working environment to compare to!