Yes, refitting means scaling, and it will work in Poser 8.  It doen't HAVE to be perfect, just close enough.

I know it feels like everytime you start to figure something out, something sets you back, but really all this knowledge is accumulative.  Best advise is to take baby steps and learn incrementally.  That way you won't get overwhelmed and discouraged.  Stick with it.  It can produce results that make your jaw drop.

Keep playing and learning.  When you have a question, never be affraid to ask.