Help unzipping old zip files

[popeyespappy]

I've got 6 floppy disks, that's right floppy disks, with a single zip file that spans all 6 disks. They probably date to around 1991. Each disk has a single file with the same file name (filename.zip) with the exception of the 6th disk which also has the PKUNZip executable.

Anybody remember the command syntax to unzip these files?

Maybe you can email support at winzip.  The worst they can do is not answer.

Actually PKZip is still around. It says they invented the format. I was kinda saving them for a last resort though. It looked like the kind of place that charges for answers.