I just had a meeting with my lead developer. He explained to me that SWFs were not easily, if at all, able to be adjusted in size, due to the type of file and encoding.
The only thing I have come up with is that if you want to change an SWF, then you have to have Camtasia(or a program like Camtasia), take a screen capture of the video, and before you compile it into a new SWF, change the dimensions to what you want them to be.
Sorry, I haven't come up with a better solution.