To some this might be a stupid question to something so simple.
Basically, which brake line goes to which outlet on the master cylinder.
http://www.photobox.co.uk/album/7306010
Front to front lines and back to rear lines would seem logical.
I just don't know?

Correct as described. You will obviously need a t-piece in each line to split the brake lines to each side.

I've connected the outlet marked P (primary) to the fronts and the S (secondary) outlet to the rears?

[Edited on 24/12/07 by GaryM]

Cheer.
Thats interesting, because you seem to conflict there, but P=primary and S=secondary seems logical?
The S is at the front!