This is a template that allows to crop and split a PDF just editing few lines of code.
Load your PDF (Project --> files)
Change opportunely the size and the number of pages
To discovering the correct size, you can use software like: Inkscape, Gimp or a PDF Reader
I put the units in mm but you can choose in whatever you want
Activate a step at a time
More info on my website: http://rainnic.altervista.org/it/tag/latex