Originally Posted by vxf
The closest thing I can think of is Goodreads...
It won't help organize your files, but it does allow you to track your books and organize them into virtual shelves.
Thanks for the link, it seems pretty similar to other sites and software I've tried though. I'm pretty sure that what I want doesn't actually exist outside of my mind!
Are there any other people who want a program like this or is it just me? I've started work on developing my own (very basic) version, which I may or may not be able to complete (my programming skills only extend as far as Game Maker
so that's what I'm using, even though it's far from ideal for something like this) but if I do finish it I might put it online for others to download, if there's any interest.