Robyn, I don't think that the implementation of Gc  control into specific Poser versions is so hush-hush.  It is probably more a marketing ploy than practical sense.  Here is a product that the developers would like you to purchase, try and produce results in a rather short time.  Although the learning curve is quite steeper than any one would realize, you, as the consumer, would like to generate a render in one sitting, regardless of quality.  Then the real education begins.  However, we are very impatient creatures and will battle with this program until we either give up entirely because of bad results or realize there is simply more to the game.  For those of us that embrace the challenge of learning this application intimately, we are rewarded with not only what we learn, but how to apply it more successfully as newer versions are released.