I saw that i have to move the file in /usr/bin/ , config to /home/user/.mplayer/ , menu.conf to /etc/mplayer/... but I do not know what to write in the terminal to do this I'M veeeeeeeeery nooooooob
cp /media/mmc2/config /home/user/.mplayer/config sudo gainroot mv /usr/bin/mplayer /usr/bin/mplayer_old cp /media/mmc2/mplayer /usr/bin/mplayer cp /media/mmc2/menu.conf /etc/mplayer/menu.conf