Ok yet another issue with SP5 install. Devs please make future SPs fit on
CD(s) for portability.

somewhere in the mist of copying SP5 from one network to laptop to separate
network something corrupted. install claimed to complete and rebooted server.

server claims to be SP4a and Conmngr is not found so system is halted.

Heres the questions.

A) how do I force a down-server upgrade?
I try down server upgrade, I get a Running upgrade must be attempted before
a down server upgrade can be performed.

B) Manually undue the upgrade.
the problem I see with this is I have no idea which parts actually succeded.