Here's how to create and install your own custom POI's on a Discover Pro unit. I've used a list of "National Trust" properties in the UK as an example (as Speedcams are copyrighted) but you can use any combination of suitable POIs you have access to.
All of the instructions and specs can be found on the VW web-site in their FAQ at:
http://www.volkswagen.de/de/navigation/faq.html (German).
The important points are:
You need to get compatible POI files - e.g. in ASC or CSV format are the easiest. If you want to create your own icon, this should be 39x39 pixels in PNG format (transparency is supported). Once you have these, you need to use VW's NAV-Companion web-site to create the installable POIs. This can be found at:
http://www.volkswagen.de/de/navigation/discover-pro/poi-listen-sammlung.html (again, German - there are no English versions available).
The output from NAV-Companion is a zip file (
National Trust POIs Discover Pro.zip in this example). To install the POIs, you'll need to extract the contents of the zip file to a blank SD card. You'll end up with a single text file (metainfo2.txt and a folder 'PersonalPOI' on the card). Take the card to the car and then follow these steps to install...
Insert the SD card into the Discover Pro.
Press the hard key "Menu".
Select the option "Setup".
Scroll down and select "System Information".
Select "Update Software".
The Discover Pro now displays the "Software Update checks". Select "Next" and then "OK" and "now."
The device will now reboot. Then the POI package will be available in the navigation context.
You can only install one set of personal POIs at a time - the file you install overwrites any previously installed custom POIs, but you can include many individual POI files in your set (so you could create individual zoned speedcam sets quite easily for example).
I've also attached a file called
National Trust Source POIs.zip that contains the source POIs CSV file and icon in PNG format so you can try the process yourself.
There's no mention of the Discover Media unit on any the NAV-Companion pages so I guess this is only for Discover Pro - but would be interesting to know if the Discover Media does anything if you follow the installation instructions above - maybe a Discover Media owner could try it and let us know.