sorry forgot to tell u
u should try to check out a program called yum or apt-get they will make searching and installing software a whole lot easier .
example : if u want to install mplayer in apt-get all u have to do is type apt-get install mplayer
thats it , it will download it from the net and install it for u and if it needs any other dependancy it will download it too ,
to make things easier there is a gui for it called synaptic.