List of content, "bird-calc.zip" file:
- - - - - - - - - - - - - - - - - - - - - - - - -
read-me.txt				the instruction file you are reading right now
birdsmouth-calc2.htm	that's the web page containing the spar calculators
Birdsmouth Calculator	a Windows shortcut to access that web page 
shortcut4.ico			a Windows icon for the shortcut 
med_th.jpg				the thumbnail you see in the middle of the calculators, standard birdsmouth
Defin-01B.gif			the larger illustration for accompanying definitions, standard birdsmouth
M-Bird_sm.jpg			the thumbnail you see in the middle of the calculators, modified birdsmouth
M-Bird_def.gif			the larger illustration for accompanying definitions, modified birdsmouth
navbar.css				the style sheet used for the web page (optional) 

All you have to do is extract the content of the zipped file on your PC to a folder of your choice. 

Then, going to that folder, you can double-click on the "birdsmouth-calc2.htm" file to launch the calculator.

Or you can copy the shortcut(Birdsmouth Calculator) and paste it to your desktop, if you want. You will most likely have to correct the properties of that shortcut, though. Here is how to set it, using the newly created birdcalc folder as an example:

Target:   		C:\birdcalc\birdsmouth_calc2.htm

Start Folder:	"C:\birdcalc"

Change icon to: 	C:\birdcalc\shortcut4.ico
