need help with macromedia flash mx 2004

Hi there,
I've got a problem with flash mx 2004.
What I am trying to do is as follows:
- I insert about 50 images (each 2 mb)
- they move around the screen and then move outside the screen (so the images are still there and that uses a very lot of memory.)
- So after I displayed 45 images and after that my memory runs out, so flash player gives a runtime error.

I may have a idea how to fix it, but I don't know how to do that exactly.
The idea is to just unload or just to remove the image, let it disapeare from the movie, so it frees up memory.

Anyone got an idea, thx a lot

Jeroen Meijer