OZAB is used to search and view files in your zipped olga archives. Use the internal viewer or configure your own
favourite. Change and save back to archive when using the internal
viewer.

Just download OZAB to you Olga zip directory and click on the Index button. Once the index has been build you can go to options to define your favourite external viewer. If you want to use this viewer just uncheck Use Internal Viewer and the file will be opened with you own viewer. Leaving the External Viewer blank will cause the file to be opened with the associated program for that file type if Use Internal Viewer is unchecked. If you do not have the Windows Installer Engine installed you can get it here.