Bad news for the "use the old prop" option.  I have imported all my previous runtimes dating back to P6 into new Poser Pro 2010, and for the reason of the remapping, all of the primitives, no matter what version you load or from what runtime, apparently suffer from that new UV problem.  Why PP2010 is ignoring the UV data on the old props, I don't know.  Some people say their props work right, but mine don't.

I'm running PP2010 on a Vista / 3GB / 256ATI Radeon desktop.

I have found a fix if you are suffering the same problem.  Open older version of Poser and simply export the old primitives as OBJ files and then go reimport them into PP2010 and save them as new primitives.  This apparently preserves the original UV information and PP will read and map them correctly then.

If you have mondo props made from primitives...you may have a problem now.  I'm thinking the UV issue might be because the props are named the same and have similar polygon count??  In other words, maybe PP is thinking the "old" prop is the same as the new prop and applying the new wrap-around texturing UV data.  I don't know.

It's odd.  I can load my P6 box from my P6 runtime into PP2010...and export it...take it to UV mapper and open it...and it shows it has the wrap-around, unfolded UV data that the box in PP2010 has.   Yet, if I open the same box prop into P6 or P7 and export them, the UV data shows the single image, flat plane.   How is that even possible?  It's the exact same darn box right?  The problem lies with how PP2010 is applying texture data and I really don't think it's supposed to be doing this.   On the PP2010 box, yes...but doing this to the old box prop...no.  Something got weird there...what it is or how it is...I have no clue.

As I like to say, I'm a quarter living in a dollar world...so this thing blows my tiny little mind to hell and gone.  But again, export the props from old version and they retain their original UV data when imported into PP2010.

Why fix something that wasn't broken?  The sphere and the torus were a little UV-wrecked, but the box and the single sided square were fine.   And I wouldn't mind the remapping if the darn program just mapped my old versions properly.

But anyway, export as objects and you can get around it.   Just make sure to save from old version of Poser and not PP.  And when building new stuff, make sure you use the right box.

Hope that helps.