With version 5.0 or later, the Explorer will access Excel functions and the spreadsheets will automatically open in the active window. Download the free viewer. Install the viewer by running the xlviewer.exe file. The viewer will install a plug-in that will allow Netscape to display the files in the active window. Quit and then restart Netscape.
Preferences menu item.
Enter XLS for the File Extension. Browse your system, locate, and select excel.exe as the application to use. You will have to toggle between Netscape and Excel in order to do the exercise. You can save the spreadsheet to your hard drive and then open it using Microsoft Excel.