Dieselengine:
1) they send you the JKI booklet when you are invited for the interview.
2) as stevop21 says, you should know this man.. it's private pilot license level knowledge
3) no maths until Stage 2 as far as i know
4) the medical form was pretty simple, just about your eyes, whether u had any operations or stayed in hospital for any reasons after birth, medication, etc.
I wonder if there's anyone brothers out here who did Stage 2 recently and could share what they had to do. Please offer some guidance if there is anyone out there..