I've written this .rvb script (for rhino4 or rhino5wip) that will allow you to easily toggle in and out of a hiddenline mode.
SetHiddenLineMode.rvb - (change .txt to .rvb)
Hidden Line.ini - setup file with colors
Hidden Line White.ini - setup files with just white lines
I normally link the script to "HiddenLineMode" alias in rhino, and with HiddenLineWhite mode, I get this:
Then, with a bit of photoshop, I'll get the nice black-on-white:
(I'll show you how to get a hi-res image later)