The pics on your nav screen are the size of ...uhhh...a winegum....
However if you have choosen one winegum....the pic becomes more then half the screen size and very sharp and pro...that following screen allows you to choose "info' (all the extra the info you have given it...say opening hours phone numbers...detailed adress..names of persons etc.)....and/or START...
I just download pics from the web of say my hotels, restaurants, clients, and even favorite car parks.......I even took a photo of my house...very cool if you press HOME..........I am amazed I am not hearing anybody else about this feature...
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The cd card can ofcourse still be filled with MP3 music....your system will read both....

again the link...I have posted it here before as well as a translation...
http://www.volkswagen-nav-companion.de/results.jsf