How would I put together images for a theme without a database?
You don't need a database for images, they go in the file system...
I mean the file system. Sorry.
You can't, just host the images externally (ie. use a free image host).
You'd need to upload them to imageshack or something and change the URLs of the images to hotlink to them. It'll slow down your forum though.
What I mean is, there are images such as forum markers than are on and off, and I don't know how to do that without a file system. How can you set the on off like the markers when there is a new reply and when there isn't?
Other than that, what about small markers for threads?
They can't use a PHP file, they don't have FTP access, hence asking to do this without FTP access.