I'd insert the VOR into the Active flight plan above the STAR and ILS,
then go DIR INTC to it. You won't lose the STAR/ILS. Profile will be wrong, of course. If required, you (or the PM
) can then Lat Rev off the VOR waypoint to set up the new arrival/runway.
Or...As soon as they give you the Direct, Copy the Active (if not already done, as mentioned) then do your direct to.