Diskcopy (muliple disks?)

I have DVD-2oneX and Toast V5.2.1 on a Power Mac G4 dual 1 MHz - OS X 10.2.6 (Jaguar) 1.5 GB memory, should I be able to make a “Diskcopy” on multiple disks (DVD’s) ? I see no options to make that choice, as it is Toast just tells me I don’t have enough free space.