You'd be insane to switch to 32bit now. That's like trading in your Ferrari for a taxi. flash player works perfect on 64bit, it just doesn't work with IE9 yet (or does it, maybe some one can clarify that one)
For flv files get VLC player. what files are you trying to play? what's not working? Internet, video?
Thanks for the reply,its only talk sport i cannot get on line as it asks me to download flash player,might sound petty but i work in the middle east and its my lifeline for football