unshieldv3 (extract v3 InstallShield files)

unshieldv3 is a command line tool to extract the *.Z InstallShield v3
packages many old windows games were distributed as.

The files unshieldv3 supports are identified by the file command as
"InstallShield Z archive Data", and begin with a hex signature of
13 5d 65 8c 3a 01 02.

See also:
- unshield, for other types of InstallShield files.
- isextract, for another v3 extractor.
- cabextract, for cabinet (.cab) files.
