isextract: isextract (extract v3 InstallShield files) isextract: isextract: isextract is a command line tool to extract the *.z InstallShield isextract: v3 packages many old windows games were distributed as. isextract: isextract: The files isextract supports are identified by the file command as isextract: "InstallShield Z archive Data", and begin with a hex signature of isextract: 13 5d 65 8c 3a 01 02. isextract: isextract: isextract: