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Hello CaptainInsane, Thanks for your reply. I understand that I need to unlock the drive in the Avic before I can make adjustments to map data files on the harddisk. Those methods have been pretty well described on this forum. Currently I am only looking at the data files on the latest update DVD for the Avic HDx (CNDV-800HD). I assume their structure (at least the data portion of it) is not changed after transfer to HD. For me playing with assembly language was a while ago, back in the years where cpu's like 6809 were popular. SH4 assembly language is not my habit. I would have to spe

Hello CamelTowing, Thank you for your reply to my post: ------------------------------------------------ Only the F-series allows you to add POI On the Z, your only option is to put specific ones in your address book before you leave ------------------------------------------------ I am aware of the fact that the F-series have the possibility that I would like to see for my Avic HD3. I Also know that currently the address book on the HD3 allows to store around 400 entries. For my hobby I would like to a) store a lot more: around 15.000 entries and I do not like to type and squ

For my motorhome the possibility to add POI's myself of camp sites (=not campings) to my nav system would drastically increase its value to me. Unfortunately I have not found the possibility to do this for more entries than fit in the addressbook on the Avic HDx (Zx for USA). I have contacted Tele Atlas and Pioneer to offer a solution but without success. I assume unlocking the drive, opens the opportunity to change the contents of files. I am not sure which files and how to do this. Has anyone tried this with success and which tools are suited for this? Many thanks for directions.