"we" have done this hack on Pofessional navi ( E90 / E60 ) , and the photo is not for X3 :-( mk3 mk4

so if you whant know more on how to add POI ONLY on dvd professional for e90/e60 and NOT for X3 you can read on e90post http://www.e90post.com/forums/showthread.php?t=6727

a lot of friend are looking for people that want do this hack on HIGT navi's, the way is not the same but maybe a litte closer to it...
so why don't make a resaerch group for add new POI on high navi?

(i have e90 so i can't help too much :-)