Poser 9 I believe creates a default "Runtime" in your Users/My Documents area.  If that is OK with you, go ahead and find it via Windows, to make sure you see it.

Once you confirm the location, re-run those installers and make sure to point to those directory locations to install it. 

...or you can find where they installed, by searching for "Runtime" on your PC, and just cut/paste/merge that dat into the Poser9 runtime...so your PC is not cluttered.