yes
now is working i was able to upgrade, thanks maybe the server wasent working

yes you download an ubuntu image specified above. You make a live cd or usb stick and boot your pc on (it is very easy, google is your friend) And finally you access to your sdcard on this ubuntu live, directly on your pc. http://old-releases.ubuntu.com/releases/14.04.0/ and http://unetbootin.github.io/

Hello multitap is not supported by all emulators For SNES there is a solution http://blog.recalbox.com/forums/topic/multijoueur-sur-snes-solution/ PSX multitap doesn't work for others i dont know