Spent most of this morning rewriting bits of the basic Image Loader, to work with Spritesheets instead of individual sprites, and then additionally to fix the filename stuff.
A few basic errors have also been implemented.

I'm near enough ready, now, to start working out the Threading stuff, but for the sake of testing, here's the latest download.

Starting to get slightly larger, now, since it also includes 2 images, but otherwise everything's at a more or less maintainable size.
.. I think!

As always, be sure to let me know if it works for you.
Thanks.