The Millennium Girls (Preteen and Preschool) are based on V2 in the same way that Laura and Maddie are based on V3. the Laura PT (or Preteen) and Maddie PS figures included with Laura/Maddie have been  reshaped to wear the original Millennium girls clothing.

As a completely unrelated side note,  after doubting my spell checker, I found that "millennium" is spelled with two n's and I've been getting it wrong for years - so I've learned something new :-)

Just occurred to me. You can download  Crossdresser from Evilinnocence for free. Since they only charge for the target figure for conversion and they have a free target for the Millennium girl, you should be able to use it to convert V3 clothing, if you don't have Wardrobe wizard or Poser 8 and if you're willing to use the Laura PT figure. I think you can still use the Laura head/face morphs on her and the textures but not the body morphs.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken