when bypass is done what is unlocked besides video. what part of the navi should work? I need to confirm that before i question the guy who did my bypass. do i still need to have the navi disk in to use certain navi functions while driving?

Everything should work if bypass is done correctly. You will have full NAV access to search POI, search address, etc.

But do I still need to leave the disk in to do those things? I notice that it only greys out when there is no disk in the player.

I am sure the N series requires the NAV disc to be installed in order to do any NAV funtions. All the data is stored on the nav dvd.