I got to level 6, it's all about not knowing what to do. It's driving me nuts

You can use whatever you can including programs to solve the riddles. You must have quite a big knowledge about pc's, the clues can be everywhere in the source codes, in the links, in the page itself etc.etc.
I'm gonna play again today, it's getting quite funny here at work with more people playing. Don't know how long the fun will last though before frustration gets the upperhand. I was hoping you guys could help me out
PS there's a hints page on the main site, but it only covers like the first nine levels than you're truely on your own.