Pepakura prints several pieces per 1 sheet.
You can arrange the pieces to fit the pages as you see fit.
Im not at home at the moment so i cant hit ya up with any estimate of pages for a helm.
If you wanted to know just download pep. then get some helm files from the database.
So when iam putting he pecies in the boxes with the lines a round aim thats a page. how do i scale my helemet before i print so it will fit on my head and how do i know differnce between moutain and valley fold?
dots and dashes mean fold up, and dashes mean fold down (sometimes it the other way around, but you figure it out pretty quickly), you set the scale by specifying the height, in centimetres, of the finished part
I got mine to fit on 17 pages. The assembled helmet may need some trimming around the hole where you put your head in depending how fat your head is
(at least i needed to).
And NZ-TK i think you have it backwards, dot dash lines are valley and dots are mountains.