The files in this archive are packaged using Info-ZIP's compression utility. The installer uses UnZip to read ZIP files from the disks. Info-ZIP's software (Zip, UnZip and related utilities) is free and can be obtained as source code or executables from various bulletin board services and anonymous-FTP sites, including CompuServe's IBMPRO forum and ftp.uu.net:/pub/archiving/zip/*.
