SP,
I was just fooling around with my Paint program. It's included with every Windows and you'll find it under the start menu...go to programs....go to accessories...select paint.
Under file, select open and open the shot you want to reduce.
Then while it's open...go under "image" pull-down menu and select resize.
There you can put in the % that you want. 25% will reduce it to 1/4 the size it was...I think.
ET