Renaming Multiple Files
Or in a nutshell - select all the photo files in your folder and Press F2
The first file selected will have its file name highlighted ready to be changed...
Type in the new file name e.g. EC135 ( if it were a set of pic's of your favourite Police helicopter

) and hit enter.
The first file will now be named EC135, the next wil be EC135(1), then EC135(2) etc.

Coconutty