If you only want the effect of flash, you can consider about ajax, which can achieve the
same effect with flash, and it is also much lighter than flash. However, ajax requires a
good skill on javascript and knowledge of xml.
If what you need if flash, and don’t want Adobe flash to update it, I’m afraid it’s hard to
achieve. The reason is that most of the time, you can’t modify the flash file which has
been compiled. You can only modify and re-compile the source file to generate a new flash
file.