If it helps you save wasting your time looking....I've spent *years* looking for a method to get Poser to do it and have never found anything suitable and long ago decided it was OK to combine Poser and Photoshop instead.  I know you have Poser 7 but you might like to know that the latest version of Poser can produce a kind of line art which sometime looks OK.  I've yet to really delve into it myself, but this is a quick test, a picture being worth a thousand words an' all.  Direct render out of Poser Pro 2014.

 

My self-build system - Vista 64 on a Kingston 240GB SSD, Asus P5Q Pro MB, Quad 6600 CPU, 8 Gb Geil Black Dragon Ram, CoolerMaster HAF932 full tower chassis, EVGA Geforce GTX 750Ti Superclocked 2 Gb, Coolermaster V8 CPU aircooler, Enermax 600W Modular PSU, 240Gb SSD, 2Tb HDD storage, 28" LCD monitor, and more red LEDs than a grown man really needs.....I built it in 2008 and can't afford a new one, yet.....!

My Software - Poser Pro 2012, Photoshop, Bryce 6 and Borderlands......"Catch a  r--i---d-----e-----!"