This page covers support for the supplied software that came with your camera.
You might need it to help you transfer movies to your computer. I don't know the software and don't know if there's any form of software that allows you to assemble the individual file (clips) into an overall movie.
Assuming it doesn't, you need something like Windows Live Movie Maker. there are plenty of tutorials about to show you how to make a movie. When it's done, the various clips are made into a movie whic you could either burn to DVD and then import into the PS3, or save to USB stick and copy to the PS3.