No installation is necessary.  Simply copy the
four .xls files to any empty folder, then open
Yields.xls with MS Excel to start the program.

If you open Excel by double clicking on the
Yields.xls file you might get a run time error if
Excel is configured to use a default file location.
Close Excel, then open Excel from your Start menu
and use Excel's File/Open menu commands to open the
Yields.xls file instead of double clicking on it.

This application was written using Excel version 8.0e.
Previous versions may not support some of the features
used in this application.

The program contains macros.  Excel may give you
a virus warning when your first open Yields.xls.
This is normal practice if you have Excel configured
to warn you about workbooks containing macros.
There are no viruses in the original genuine release.
However, second-hand copies can pose a possible
threat.  So it is recommended that you check the
files with your anti-virus checker beforehand.

You can choose not to enable macros but will lose
so much functionality as to render the program
unusable.

You may also be prompted to update links from other
workbooks when you open the program.  This is the
program looking for info from the three accompanying
UpgradeScenario files.  Click Yes.  These files are
used by the Yields.xls program, it is not necessary
to open the files manually, the program opens them
from the Upgrade worksheet when you select lights.

Thanks to Lucas for testing the funcionality of the
program.

pH