You may want to run Correct Reference after moving a runtime. This will fix any incorrect references (like full pathnames used in any file). The free version is usefull, the pro version is of course way better.

When run for the first time you will be amazed about the number of errors reported (even in files delivered with the standard package).

Once you get the hang of using different runtimes (and using Correct Reference for fixing problems) you soon find yourself reorganizing your runtimes several times until you find some setup that works for you (and this will change over time as content and experience grows).

Having a runtime on a CD is not the best idea, when you leave Poser with this runtime active the next time you start Poser it will try to activate this runtime, this may cause all kinds of problems if the CD is not in the drive.