Mike,

I think Michael wants to keep MoIs layer(styles) structure.
I find it usable as it is. I imported the PDF into Illustrator CS3 and by clicking on the circle in the layers palette I'm able to select all outlines or thin lines at once. I did a bit of cleanup (removed several rectangular clipping masks and renamed the three important layers).




This looks very promising Michael! I'm looking forward to silhouettes to give the illustrations the final touch.