How do I change the pixels in a picture and give it a red back round?

I'm trying to make a car icon for my tom tom gps out of a picture I have saved on my computer. It says you have to change the picture to 80x80 pixels and give it a red back round. The best picture program I have on my computer is paint. Can someone please help? Thank you thank you thank youHow do I change the pixels in a picture and give it a red back round?
I hate those red back rounds. They're always rolling away.How do I change the pixels in a picture and give it a red back round?
yes go to splashup.com

that's better then paint atleast!!!