The website is a wiki. Anyone can create and edit. If you clicke don create topic you would be send on a page where you can create a topic by entering a Title (name), a small description and a few...
You can just open them in photoshop and save them for web. What do you mean by compressing? Compressing it's size (width&height) or just compressing it's size on disk (bytes).
If you want to save...
1. The header is confusing. That "www" image should not be there
2. You should get a logo, your curent "websites-blogs" logo is only text-based and it...