Poser needs them if you have more than one figure in your scene. Use the first one to magnetise to your first V4 character, and subsequent ones for Victoria 1, Victoria 2, etc.
That's what the manual says anyhow. Me, I can't them them to do anything useful anyway.

"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)