I put her in a reclining pose, since he said lying down was a problem. 

I just set it up and ran it again.  It doesn't look good - like I said, I don't this hair was meant for extreme poses - but it ran very quickly and collisions seem to have worked.

I've been using the hair room since Poser 5, and while rendering is much faster with P9/2012, dynamic sims seem to be much worse.