General questions about SCJD

Last week I passed SCJP and now I'm thinking about STEP #2:-). I've just read pages on Sun's site regarding this exam and I got several questions.
Firstly I have to pay (that's understandable). Secondly I'm downloading the packege and have to complete the project. Now my questions are following:
1. How much time do I have to do it?
2. How difficult is this project and which technologies I have to know?
Thanks in advance.

Sorry for disturbance. I found the answer to my question already.