i do have my old runtime, and i'm going to transfer everything, except for the Prefs and Python folders.. but actually, i'm not even gonna merge them, but rather integrate them.. i mean, i will transfer my structure to it, rather than fully replace it, so everything should be fine...

and i do have the mac version of Poser 6... it runs beautifully so far, so we'll see how it does with my PC runtime... i'll do it soon, so i'll report back here... thanks for all the help!