<< You can't make a multi-volume set of ZIP files unless you are spanning multiple disks (annoying!) >>
WinZip 8.1 will allow you make multi-volume Zip files - version 7 and prior did not allow you to do this function. To invoke this under WinZip 8.1, you create the regular Zip file, then split it up. When splitting it up, there are several options (CD-650 MB, CD-700 MB, etc.). Very good stuff!!