Aaaah, now thats interesting ... okay so I cant use Vue's render engine on P5 dynamic hair. It looks like Poser have moved away from allowing their product to be used hand-in-hand with things like Vue and are relying more on their own engine.. on the good side however, all of the Poser4 products still work and the upgrade means you can keep P4 and P5 on your PC .. I'm pretty sure the licensing would allow you to use both :-) Thanks for that Eric, it saved me some hours of frustration in the future :-) Mark