Sets the FallBack printer driver to one of: 0=No fallback print drivers, 1=Best guess, 2 = Best guess and if no match is ...

Sets the FallBack printer driver to one of:  0=No fallback print drivers, 1=Best guess, 2 = Best guess and if no match is found fallback to PCL, 3=Best guess and if no match is found fallback to PS,  4=Best guess and if no match is found show both PCL and PS drivers.