Dev - Also, on form submission, use GD to resize the image as a new thumbnail file
Dev - In the submission form, you can now upload a banner image
FPS Demo Source
The one thing I ask is that you use the source for learning only, and do not just edit it and release it as your own. It contains some code written by Percsich.hu, and a modified version of a skybox that Yourself put together.
Thanks to everyone who's followed this over the months it's been out, and I hope the source is of some use to you, however messy it may be.