Attached Link: http://forum.daz3d.com/viewtopic.php?t=9060&start=0

Some people auto install directly to their runtimes, and if you don't have a poser.exe file inside each of your external runtimes, poser wont' be able to find it. I learned how to work with multiple runtimes at that link. So Cliff probably explains the reason behind the poser.exe file better than I do.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi