the way i protect my pictures is i put my card into the computer then go into the blackberry folder then right click on whatever folder you wanna protect and make the folder hidden. then the phone doesnt scan those pictures and if i ever wanna look at them i go to media --> explore --> media card --> blackberry and then i press the blackberry button to bring up the menu and it shows all your ooptions. click the option that says "show hidden" and your hidden folders show up. then just open it and you can also select if you want to view them in thumbnails or list so its practically like the media way only a few more steps for privacy
i hope i explained that well enough...