Trying to use one index file for all files in a directory

[Jeffrey Schmitz <jeffreykschmitz@xxxxxxxxx>]

Hey, it's my first time using this mailing list, so I apologize if I'm doing something wrong... 

That said, I have searched for a way to use the index.php file that I have created to be the default for all folders nested in a top level "Documents" folder. It basicly searches whatever directory it is being called from to find any images/pdfs contained and produce a gallery based on them. I could copy this index.php to each of the nested folders but it seems to me there must be a more efficient way to do this in Apache. I found that a .htaccess file can be placed in a top level directory to call directives on all sub folders, but I can't figure out a directive that would achieve this goal. Thanks for any help!

-Jeff