I called Vicky a P5 as she really is a different creature than the P4. However, officially Curious Labs is speaking of their Pro-pack as for Poser 4, rather than a Poser 5 upgrade. I'm sure there is some marketing reason for it, but they just might as well have called it Poser 5, and since the Millenium is for the next 1000 years (or doesn't even start until Jan. 2001), so Zygote or anyone else will not likely be using the "Millenium" term past 2001, when we will no doubt see some type of "P6" model. But Vicky is a lot more morphable than you think, once you start to play around with her dials and add a few other morphs. I've also already seen some great P5 Michael characters already.