old navigation system without DVD

Hello, have a 2000 V70 with the old Navi – without DVD and 16:9. Are there any new current CDs for these Navis? As of 2003. If so, where and how much does it cost? Is there an internal software update at Volvo – i.e. can you flash the EPROM? To speed up the whole operation and computing? Because sometimes the system hangs and it takes forever until I can select a city or street. Is there any way to reprogram the Navi, because towns that of a city t does not know it. There you have to always type the city on the center of town and then choose the appropriate town. So how do I know in not near home which town belongs to which city?? And now nobody comes up with the idea to say that the general education is.