posting pictures,school me a little

I use Paint to resize my photos as needed. I got a new camera and the resolution was set too high. A trip to the Mopar Nats and I had over a hundred shots too big to post. My "computer head" son resized the whole file for me. I have no idea how he did it though. I can get them done in Paint one at a time. Paint is part of the Microsoft programs that are loaded on your computer. Here's a sticky on the subject: http://www.forabodiesonly.com/mopar/showthread.php?t=3540&highlight=resize