Replacing/Resizing images to decrease file size

I’m not sure my title made any sense, but anyway. What I need to do is make my flash intro a LOT smaller. It’s around 2.5 mb and that’s pathetically HUGE! I can’t change my bitrate any more. 64 is as small as I can go, and medium quality, but I know that the images I used when I imported them were pretty big and I resized them in flash to fit my movie. Is there a quick easy way to save the images smaller and replace it in the movie without having to remake my animations? I recall an option “swap symbol” which I have never tried, only seen. If that does what I think it does, I don’t think it will help me that much.
Another thing that makes re-animating it hard, is that each photo I used I converted to a symbol and each symbol I gave a motion tween to fade the alpha in and out so I’d have to do that again to each of the ‘new’ images. (I have only been working with flash 2 weeks, so when I do things, I only know the long, hard, miserable ways to do it. I could really use some tips here. Is flash so wonderful that is happens to have a way to swap my HUGE image for a smaller version that I decreased in photoshop and not mess up the animation or the scales and rotations and everything that I’ve already done? I’ll give the link to my intro. I’m rather proud of the way it looks, but even on my high speed connection it takes a long time to load. Dial-up wouldn’t even get to see anything for at least a year. So if anyone can look at this I would love it. I can upload the fla to the same server, if someone wants to see that, but I’ll wait to see if anyone needs it. thanks everyone. The link is… www.capturedimages.net