What is best way to do handle audio files?

On my website http://www.sidekick2music.com ! I use scandir() to fetch all the files which are all in subfolders of this one folder. like this: public_html/amrs/$cat/$author/*.amr $cat = different catergoried of music $author = Authors of the particular catergory This way isn't fast when you have over 5,000+ files. I use flatfile for everything on the site! site: http://www.sidekick2music.com Would it run faster if I used mysql? How would this be done? Is there another way when dealing with files and organizing them? CMS? ~Nick Couloute co-owner/Web Designer Sidekick2Music.Com