Hexcellent.
We are on our way!
The AMS seems to have resolved it's communication issues with itself late monday, and is showing Green.
Now that I know it's avengine.exe, and have allowed that through the firewall, other computers on the network are showing Green as well. Corrected the ports on some that needed it as well.
Current status, 6 Green, 1 Gray (just waiting for it to speak up as the others have gradually done).
Wasn't able to put the SQL on the W2K server as it needed internet access to verify it. I intend to up it to SBS 2003 before too long anyway, which will solve that one, and a few other things.
Thanks very much for all your help so far Vlk, it's been invaluable.
I'll be sure to bug you if and when I have more issues
HL