Pro Pack is an extra for Poser 4. Though they could be purchased in a bundle, they are originally separately priced products. Body Studio is an extra for Poser 5. Again, separately priced products. An upgrade to Poser 5 for Pro Pack owners is $89. An upgrade to Body Studio for Poser5 and Pro Pack owners is $129 (not the full price of $179) and adds features not available in Pro Pack such as support for Poser 5 Dynamic Cloth and Hair (the hair is still in beta, but there is no additional charge for that upgrade when it is complete). Compare this to Poser 4 which is now available for $119 , and Pro Pack which you can now purchase for $139, both of these reduced from their pre-P5 pricing. I fail to see a problem. Upgrade pricing is somewhat comparable, both upgrades lower than a brand new purchase of Poser 4 and Pro Pack. Poser 5 is an upgrade from Poser 4, which contains some of the Pro Pack features built in. I don't recall ever seeing any claim made by Creative Labs that Poser 5 contains all of the Pro Pack features. Body Studio is an upgrade from Pro Pack which includes the remainder that isn't already in Poser 5, plus support for new Poser 5 features. Add to that that Body Studio is made by a 3rd party, not by Creative Labs themselves.