As I remember, the problem with duplicate files in different Runtimes was not a problem at all until they introduced an 'improved' method of file searching with Poser 7 SR3 and Poser Pro SR1. I read up all about it, but it's a long time ago now and I don't remember the details.

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)