NameChanger is free and is designed for the sole purpose of remaining a list of files like the ones that you
download to your computer from your digital camera or download from the internet and want to change
the name of those files.

To install NameChanger just download the zip file, open it and drag the app to your application folder.

How To Video from NameChanger available -HERE-

Or

Steve's Mac Fix YouTube Video a more detailed explanation