For the navigation system to work, a memory card will have to be inserted in the slot. Its not worth it since the maps configured in the system are of Japan. However if you want to run the audio and video player then you just need to have a memory card swiped in the player. Keep in mind that whenever the battery cable is removed, your software would be erased hence you will have to repeat the swipe procedure to make the player work.
I know a dealer who will charge 200rs for this swiping procedure, contact Javed 03212521612, hes located near Noorani Kabab House, Khalid Bin Waleed Road.