Whelp- The Iray shaders for Trystan for M4 are done and available in my freebies section for those who want them.  You'll have to purchase Trystan for M4 for Poser if you want to use them on him, but I'm sure they can be tweaked to use on other M4 products.

http://www.renderosity.com/mod/freestuff/?item_id=75449  The Trystan Shaders.

http://www.renderosity.com/mod/bcs/trystan-for-m4/109509/  Trystan M4 for Poser 9+