important update: just heard from another creator who contributed in this way.

it seems the copyright on these 2 models was given to the makers of poser,therefore I'm unable to give any permissions for anyone to modify and/or redistribute these ones.

Something - that isn't a uncommon situation within the world of licensing and content creation. 

Did you expressly grant SM (or E Frontier America) your copyright in the models? There are models included in Poser from us, and we did not transfer any copyright at all. Our stuff is there for normal art usage.

Best regards,

chikako
Meshbox Design | 3D Models You Want