I have been trying to do something similar for months. Even trying to take control of the files as an administrator fails to give me permission to copy some of the files.
I even setup a dual boot option to transfer the files to XP and then drag them from the partition. exactley the same. No go.
It's quicker for me now, to transfer the files to an XP machine, write them to disk or USB stick and then load them on to Vista.