> Just because the program isn't artificial
> intelligent, doesn't mean you should abandoned it. 
> You're not going to find any other that could
> either.

It doesn't require artificial intelligence, or sarcasm either.

In your web browser, save an image to your HDD. Now try to save the image
again. You will get an error message telling you the file exists, and it will
ask if you want to cancel your action or overwrite the existing file (and
sometimes you get the option to rename it).

It's basic functionality offered by nearly every application that handles
files currently in existence, and some of these programs even allow you to
select a default action to carry out without user input.