Due to some IM need camera in my virtualbox. get the result from ubuntu
if [ "`grep vboxusers /etc/group|grep $USER`" == "" ] ; then sudo usermod -G vboxusers -a $USER ; fi
restart the virtualbox. and follow the following instructions
DO NOT add the line to /etc/fstab, or you may meet some issue
none /proc/bus/usb usbfs devgid=groupid,devmode=664 0 0
Also: furiusisomount can mount .bin file that can be mount as cd-rom in Windows.