Google "Irfanview" it's freeware and a good little program.
When you get it installed go to Image on the menu bar and choose resize/resample from the drop downmenu. There is a limit as to how big you can have them for the board. 80x80 and 6kb I think. After you resize it save to the desktop then right click and choose properties this will tell you how big the
file is
luck to ya
or if you want email it to me and i'll see what I can do