If I get it right then you wonder if/how you could use Poser created pictures (actually any sort of pictures) to write some sort of "Myst" kind of program, right? You should probably take a look on authoring systems, most of all Macromind Director - it will offer exactly the type of services that you look for, like building trees of connected picture series, clickable hotspots, etc. pp. Of course you could write anything you like using C++ or similar, but you should be prepared that this is a major task and requires a lot of experience and an awful lot of time.