In order to play MP3's you will need to compile and install the " lame " audio codec's.
You will also need to install codec's to play back video.
You will also need to install Wine to run windows EXE's within linux.
To install A large package containing the most popular codecs
I believe you need to install the livna repository if you have notalready done so. The instructions for doing so are located here : Livna
Then you can install with yum
you may also need to install
and perhaps some others .. just do a yum list | grep gstreamer
yum -y install yumex
and you can use yumex [gui for yum] to search
You may also want to install the codec package which you can grab here : Codecs
And follow the instructions here to install them : Installation
To install Wine you can simple type the following command into any shell / terminal available
yum install wine
su yum install wine