Browser Plugins

Hi,
I have installed Knoppix on my HD and would like to do the same for others in my circle of friends and family. The only shortfall I have is that I can't seem to get FireFox to work with plugins. I have installed FireFox from the KLIK.DE facility (whis I think is wonderful by the way) and yet when I install Realplayer and then (as suggested on the Moz web-sites) copy rpnp.so into the Firefox plugin directory, nothing happens when I try to use a site that needs Realplayer.

I am having similar problems with Java.

Obviously, I am missing something about installing Plugins under Linux. Can someone please help?

Thanks,


Jim