(Note: if you use a non-IE browser, you'll have to switch to IE, some images are only guessable using IE. Also, be prepared to open your image editor of choice - you won't manage otherwise.)
After you're done with that, there's a code puzzle, then a maths puzzle, then a general knowledge puzzle.
I finished it \o/ (But, to be fair, an IRC friend and I had a go at it together - where I got stuck, he helped me out, and vice versa. I see no point in breaking my brain when working on it together can achieve better results with less brain pain. ;))