4.1 has to be installed in the main poser runtime.  However you can make a copy of the files and place them in any runtime you want.  Don't forget to run to .dos update file on your desktop.

"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