Thanks anyway, but that didn't work. I already installed the XMMS MP3 thing without any errors, and now it plays MP3's but I am still not able to play music cd's.
I tried to install Xine like someone else said to in order to get rhythm box to work, but needless to say Xine asks for packages to be installed that I already installed some time ago.
It's like no matter what I do, the things I got to work fine in RH9 won't work in Fedora.
But thanks though.