You should be able to do this using the terminal. Open a terminal window, type "cp" drag and drop the source folder into the terminal window, and then drag and drop the disk/folder you are copying to. Press enter. This should work...
I created a file with a question mark and tried dragging and dropping into the terminal. It correctly escaped the question mark, so this leads me to believe that it should work just fine. Then again, I seemed to be able to copy this test file all over the place using the finder.