A WinRAR-like program that automatically creates backups of dupe files?

[moeburn]

I often mod many of my games, and before I overwrite original game files, I have to go into the game folder and rename all the originals to *filename*.backup. Is there any extraction program like WinRAR that will do this for me automatically? I noticed WinRAR itself has a "rename automatically" option, but that renames the NEW file, and keeps the original, I want the other way around.

[figgy]

If you a looking for a mass renamer

Here is one I have used in the past: http://www.1-4a.com/rename/

BTW, Win 7 and later provides an option 'Copy but keep both files' in explorer which takes care of backup automatically (you don't have choice of extension though).

[sc302 Veteran]

You could just create a batch file to do that. Something like

Ren *.somethingorother *.backup