Quote - If all you want to do is change the file extension:

1. Open a DOS window of the directory containing the files.

2. type: "ren *.psp *.jpg" without the quotes

3. Hit 

It should take about a second.

This example shows renaming a bunch of .psp files to .jpg.

Thanks everyone.  I'll have to try one of those download utilities because DOS is way before my time with computers and  I don't know anything about DOS except that you can do major damage to your computer if you do something wrong with it,  LOL

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi