Thanks Acadia!  What exactly is a "runtime" ... I know this is probably so very basic to understanding what goes on under the hood of Poser and I see the term everywhere in threads and Poser books etc. but I've never grasped what it is so I've never paid much attention to it.  Is it a filing system? A procedural thing? A noun? A verb? Is it how Poser oraganizes stuff? 

Can I have two instances of Poser on my computer (i.e. 5 and 6),  and can they be rnning at the same time (I know people who have multiple versions of Corel Painter on their machines and jump back and forth between them .. can I do the same with Poser)?

Thanks for the help!

HG Guy