CX 9 Navigation system

I am really disappointed with the navigation system in CX9. Is there any way to hack it and install something like tomtom, iguidance, navigon etc... Or is there a way to update the POI in CX9
Thanks
Krish
 
I have not found any updated DVD from the manufacturer for the NAV system yet. Still 2006 POI's and maps. BTW the DVD nav unit is located in that little storage area in the back.
 
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