Set the DRIFT and REFSMMAT flags again:
V25N7E, 76E, 40000E,1E (that's DRIFT)
V25N7E, 77E, 10000E,1E (that's REFSMMAT)
I'm not quite sure, but AFAIK the RCS DAP isn't restart-protected, so you'd have to cycle through V48 once and do a V46E, too.
Yes and yes: V36E will cause a restart, after...