The manuals are in pdf form and are part of your download. Look for Poser Reference Manual and PoserPython Methods Manual. They are in your main runtime where you have installed the program. There is also Poser Tutorial Manual in the Tutorials directory. If you are on a PC the path should be something like this  X:/Smith Micro/Poser8/Tutorials. X is your install drive. The first two manuals are in Smith Micro and the other one in Tutorials. Don't know about Mac.
Hope this helps
pdg