Wirelessly posted (8800: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0) BlackBerry8310/4.2.2 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/102)

pnt1, if you read this thread you'll see you must OS 4.2 in order to move media via the USB. It would be easier to just email the ringtone to your self.
You PIN is located at Options > Status.
Good luck.