Weekend Puzzle

Hello guys,

So, some of your blogs are coming along nicely. I haven't put anything on here for you to look at for a while so I thought I'd better post something.

Ok, this is a puzzle with several parts. If you get it right, you will be able to find a wonderful prize.

Part 1 - Complete the crossword puzzle.
Part 2 - Unscramble the anagrams. Ok...Sorry... this won't work because I messed up. The yelow job is 'policeman' somehow I made a mess of colouring the squares on the crossword.
Part 3 - Put the yellow job into google.co.uk and open the second link.
Part 4 - In the first post there is a link to Johnno's site, open it.
Part 5 - Open Johnno's Black Book
Part 6 - How old is Johnno? Save that information because it will be the start of next week's puzzle.
Good luck.

These clues are all taken from definitions from dictionary.com.
Across
3. A person who repairs and maintains machinery or motors.
4. A person selected to rule on the plays in a game.
6. A person responsible for the interpretive aspects of a stage, film, or television production; the person who supervises the integration of all the elements, as acting, staging, and lighting, required to realize the writer's conception.
7. A murderer, esp. one who kills a politically prominent person for fanatical or monetary reasons. The word derives from a fanatical group, active in Persia and Syria from about 1090 to 1272, who ate cannabis before killing crusaders.
10. A person whose profession is inspecting and auditing personal or commercial accounts.
11. A person in charge of a museum, art collection, etc.

Down
1. A person professionally engaged in the design of constructions.
2. An academic rank given in colleges and universities to a teacher ranking below assistant professor.
5. Someone who watches examination candidates to prevent cheating.
8. A person employed by a government to obtain secret information or intelligence about another, usually hostile, country, especially with reference to military or naval affairs.
9. A female servant.