There is something in the V4 Readme file that says it has to be installed in the main Poser runtime. I'm not sure why, since I have never had any problems using it from another runtime - but I am on a Mac, so maybe it's different.

Maybe this is causing the problem with V4 not loading. You could try installing Poser itself on the external drive, and put V4 in the main runtime, and see if it loads okay from there. Sorry, I'm not really much help!

:O)

"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)