The Survival mod makes use of the campaign commander units so that the Wargear win condition works. I might have to fix the requirements.
Seems that the Survival mod already has the Honour Guard win condition included. Spawns the commander and a few HG units.
EDIT: Added the Combat Medic for the Imperial Guard. New version should be up within the next week or so, all being well and you guys don't start firing bug reports in my direction .