since my father is a piano/ pipe organ guy i have taken apart more then i care to think of if you have to get dtrings out of the way i would take the tension off first they can spring back on you and they can leave some nasty cuts, getting the harp off just takes pacience there are several screws and some of the will be hidden but paint or rust but it will come off, a few good wacks witha sledge will break it up into small enogh pieces to fit in a car. i didnt see the keyboard in the pics but if your friends arent using it in their project the ivories off the keys can make you some good moeny if they are in very good shape and you can remove them.