[Therion] -station-names prefix suffix disable

Hi Is it possible to use -station-names <prefix> <suffix> within a scrap definition, and then disable it for only one or two stations that need to have a different prefix (connecting to a different survey). I have tried using a group endgroup block within the scrap, but get therion.exe: error -- PP-ParaphantaShaftPlan.th2 [248] -- unknown command - group Bruce