Installation notes 
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To Ensure automatic file overwrite:-

   Set the environment variable PKUNZIP to -o in AUTOEXEC.BAT
   and reboot the computer. This ensures automatic file overwrite.

   This means adding the line:-

   SET PKUNZIP=-o

   on say the end of AUTOEXEC.BAT.  Select File + Run from the Program
   Manager and type 'sysedit' then edit AUTOEXEC.BAT, & save.

To configure PKUNZIP as the Netscape Helper Application for Zip files

   In Netscape select Options + General Preferences + Helpers. 

   You must set pkunzip.exe to launch for at least the following three zip file types:-

   application/zip
   application/x-zip-compressed
   multipart/x-zip

   If the file type doesn't exist then create it. For example in 'application/zip'
   the Mime type is 'application', the Mime sub type is 'zip' and the extension is 'zip'. 
   Once done then click on the relevant row in the list then click 'Launch application' 
   and then click 'Browse'. You should see pkunzip.exe as one of the possible files. 
   Select it, click the OK. Repeat till all three are done.