I wonder if any one thinks P6 works slower than P5?
I use both on a powerful PC and P6 seems to work slower
like it's thinking about every move where P5 just does
it's moves without hesitation. Rendering works great on
both. Maybe theres something I should clean or change.
Any help would greatly appreciated. Thanks

Yup, that's what I remember.   Probably not much you can do to improve
the speed while posing.   You can improve startup time by keeping most
of your content in external runtimes, but that's a separate consideration.

The one thing that might help is adding more RAM if your computer can
handle it.  Poser is memory-hungry, and when the real RAM isn't enough
the computer will use the hard disk as virtual RAM, which is slower.

When I had P6 on my other PC which was XP
it ran faster. I believe it might be a Vista thing.
It seems Vista can't do nothing without asking
half a dozen ok's. I'm running little over 2GB's
of RAM on my new machine.

Oh, Vista.  (If that sounds like cussing, it is.)

I suppose you've turned off all the Visual Themes stuff....

P6 fixed a lot of things that were broken in P5.

If your experiencing poor GUI interaction, you should try one or more of the following :-
playing with the preview / display driver options
updating display drivers

For some graphics cards there are specific things you can try or need to do to get the preview to respond properly.