Is it possible to update/POI Harman Kardon Guide+ Play series?


I like this GPS. It does a nice job. But I'm wondering if it's possible to add POI's or updated maps?

Harman Kardon Custom POI's

I hope I'm wrong, but after Googling quickly I don't see any way.

Check out

I can't find anything about adding POI's on the Harman Kardon support site either.