Script to prepend all filenames within a directory

Hey guys.  I've found an issue with adobes bates numbering tool, where file names are messing up the order in which they are numbered.  

I was hoping to write a script that users would be able to click on and add the folder extension for all the files.  

Then the script would prepend all the file names within the folder with a 000001filename.pdf      000002filename.pdf   etc...

I've never combined scripts  before but i've found scripts that either rename OR prepend.  and i couldn't find anything that would rename sequentially with preceding 0's.  

Any help is appreciated