Accessing micro SD card

I do listen to songs on my Fuze, but mostly I use to carry pictures in a portable way (I am a fairly serious amateur photographer). My intent is to have a selection of interchangeable micro SD cards that I can swap at any time. My question is, how do I operate the menu on the Fuze to go to the card? Is there a place where I can select internal memory OR card and then the particular folder? Do I have to place the files on a particular folder of the SD card when the Fuze is connected to the computer?