well before you give up, try this simple to use application first. (You should be able to unzip it with winrar or winzip.)
Drag the "LSD.PKB" onto your computer and then drag the file into the application. Maybe you'll get lucky and the application will rip the mpeg2 streams for you.
But if doesn't work out, then you'll have to learn the basics of how to use a hex editor.
Once you can do that, here's what you have to do.
Take that "OPENING.PKB" file and drag it into the hex editor. Make note of the header in the "OPENING.PKB" file.
Use that header to locate and extract the fmv's in the "LSD.PKB" file using the hex editor. I've extracted the fmv's from this game using this method. I haven't tried the first one though.