Once you get out from the Toll Road A1youshould take the Ring Road  towards Reggio- Bologna and take the exit  Mantova Parma(Centre). You have to run along the whole turn-off and take again the same ring road but towards the opposite direction ( Milano- Piacenza ) . Then get out to the first exit  (Via Venezia) and turn right at the first side-street (Via Maestri del Lavoro). At the end of the road you will find Zetasassi on your left.