I need help with a flash presentation

Ok, I have slides one for every letter of the alphabet, well on some of these I want thumbnails of images that when hovered on are much larger, I tred using buttons about when you would hover in the area that it would be big it would popup, so help with that and I want to have a video play, like an actualy wmv that ive already loaded into another flash file, but i want it to kinda sit there, with the screen until clicked on, then I want it to play, if you get what I mean please let me know how to do it, if you dont understand ask what oyu need clarifying on, thanks people.