I used to have bad experiences with content stored anywhere else than the default runtime location. I moved everything to the same default folder and it works better. However, I must say that I neither have Complete nor Poser 8 (I'm with 7.5 Infinite and Poser 7).

As to scale, you can set that at import, in the import dialog box (tick "resize object", and then "manual resizing"). Just determine once what's the right ratio (by measuring the figure in Vue and comparing to what you want to have) and use it all the time.