Bill,

My German is a bit rusty but I think this is a reasonable translation of the train schedule from Weisbaden to the Fesitval Halle.

Wiesbaden station departure 9:49 am high-speed train S8 going to Hanau station

Arrive Frankfurt station at 10:43 am

Trams/trains depart Frankfurt station every 5 minutes starting from 10:44 for the festival hall/IAA

Karl