Run the program and you can choose between 800x600 or 640x480 .
Right click anywhere in the window and it will give you the coordinates.
then it will copy it to your clipboard and you can paste into whereever you want to save it.
I did this for the mouse over plugin that Shadow made as I think it will be easy for me to get the coordinates .
if you use 640x480 just over right with that size.
Find it at my website.
Freeware but credits in your game would be nice