Thanks, Bert. I thried htat, but it did not work. Nevertheless, I just copied the old AC 3.7 files to the server, data served to clients worked from there without server installing AC 3.7 for a few days, and just upgraded from that data.
I think my Saga is almost over. I finished tweaking SBS2008 per the SBS Build document on Technet Wiki, even got Remote Workspace, SharePoint, and Exchange working.
Then I installed AC v5 on the server on Tuesday night. Glitches included the installer not liking other SQL servers on SBS (had to stop all SQL services), UAC (turn off), antivirus (had to stop all services) and firewall (had to grant permission to port AC uses). Glitches on client installs included path problems on AC wanting to install into new AC 5 path instead of local client (had to uninstall AC 3.7 first), strange behavior installing from server (copy installer to local drive), and usual preconditions (turn off UAC, run as administrator, turn off entire antivirus service). Overall, it was a satisfying experience with help of a couple of angels. It was a bit hurried because I had to start at 5am PDT (earliest angel support) and begin patients by 9am (was 1/2 hour late in getting first exam room computer upgraded).
Thank you, Bert, for all your guidance and suggestions.
Next: learn all new features and figure out how to make "meaningful use". I am sure I will have lots of questions there, but that's another posting.
