... about the decoding thingie...
I have two P4NudeWoman.OBZ on my drive. One with CRC-32 0908B326 that does work, and the other with CRC-32 EAAF2602 does not. No idea from witch installation they are, could be 6 to 8. The resulting P4NudeWoman.obj of both files have CRC-32 44EA89EF and both work for decoding. So working with the unpacked .obj (I use free, open source 7zip) on Nea_3_ZIP_OBJ.rte should be safe, no matter what version of Poser you are on. I hope this information helps.