She does work in P5, however, there are some bending flukes.  For example, if you bend her legs forward, like she was bending over, and spread her legs a little bit, her buttox starts to deform/distort as well as any clothing she's wearing.  In Poser 6 and above, these bending distortions don't seem to show up.  I know some conforming clothing items also will have issues in Poser 5.

Just my experience.

Davo