New figures load fine into P5 indeed, even through the library, you get an error message about unexpected stuff, but it loads fine anyway. Here's James in Vue 5 (opened in P5 through the linked P6 runtime)

Artwork and 3DToons items, create the perfect place for you toon and other figures!

http://www.renderosity.com/mod/bcs/index.php?vendor=23722

Due to the childish TOS changes, I'm not allowed to link to my other products outside of Rendo anymore :(

Food for thought.....
https://www.youtube.com/watch?v=pYZw0dfLmLk