Howdy,
Here's some more free advice...just my experience though.
I developed a database system that originally stored several thousand images as binary (blob) objects in MySQL...the system performance took a huge hit.
I went back and instead of storing the images in the db I simply stored a reference to the path and image name.
PHP has really easy to use file and directory functions for adding and deleting directories and files...you may find that it is actually less work for you in the end.
PS. There is (or was) an article on PHP Builder that dealt with the issue of storing pics in a MySQL db...fairly good article...should give you all the info if you're interested in pursing this method.