If you have a script running you need to write a new one while the options are saved with it. Wether you create a new script or you change approx. line 29 an 31
from
hotbackup never
vss2hbswitch off
to
hotbackup lockimpossible
vss2hbswitch on
Obviously the hotcore is automatically installed with SP5. SP5 is the first program our developers used the WiX installer environment for instead of MSI. The WiX installer does not seem to offer anything else but intall/uninstall, no Change or Repair options.