After working on this all morning, I have finally found a way to install Flash Player 9 (firefox plug-in) in a couple minutes with no scripts or manual configuration.
1. Go to a website that requires flash player (not youtube). I personally used
2. If it asks you to install missing plug-ins (showing the little puzzle piece thing) click on it.
3. choose Flash Player (9) and hit next.
4. It should automatically download and install.

Best Regards,

P.S. If the website doesn't show the puzzle piece, refresh might make it show.