They had a show on ABC before 911--I did not customarily listen to their show (even now I'm listening to the BBC rather than listen to those 2 clowns ABC), so I don't know if it was a regularly featured show or a show they did when some regular host was on vacation--but I could swear it was their own show before 911.
At any event, it was just those two broadcasting--there was no Malzburg-bought-and-paid-for-to-say-whatever-his-masters-tell-him-to-say sharing the microphone with them.
I'm taken back by your comment on Steve Malzberg. Do you actually believe that? I find that Malzberg is one of the few people on radio that really speaks his own mind, like Michael Savage. He does anger some, being conservative AND Jewish.