There are free programs out there that can make .swf files, but they tend to be really, really awful and have big ol' watermarks on them. If you're really wanting to make movies (and don't think you'll get bored of it in the first month), just buy Adobe CS3 or whatever. Be warned, though, it costs a LOT (more than 600 USD when I got Flash Pro 8 years back).
ChadsWeb
It is possible, but not legally.
Pretty sure I'm not allowed to go into any more detail than that, but I'd suggest just buying flash to stay out of any trouble.
lukeman56789
k got u just thought i might test the waters