This ought to be fun.
In my table/form I have a field for background_color. To take this to the next level it would be great to have a field for background_image. This field is not an uploader. Images are added by ftp. What it would do is use something like opendir to probe for images in a specified folder. Each image has a thumbnail. When you click to enter the field it would display the thumbs as a list or grid (with a NULL option). You select and the filename (no need for path) becomes the field entry.
Tx