Alex, you need to give it a bit more time, before you cann it.
I like most people can load a heap of Photos on a USB and stick it in a TV and away it goes, but getting these photos all together from other members might take a little more time.
It is obvious that you want as many a possible images all in the one place, I understand and also obvious the format is JPEG's
But I don't know much about drop boxes, so as I am happy to contribute images I cant organise the project but would be happy to help in an other from if there is such a thing.
Leon