DOH DOH !!!!!!!!!!!

fell at the first hurdle could not find that 3.4.805 uk file anywhere . searched everywhere , went somewhere that gave me a torrent file whatever the hell that is. Lost the plot here i'm afraid. Anyone got a link please?
Is this a full install? Also does anyone know if i can put on my 20gb temp hdd that i am using to test this unit as i dont want to buy a bigger drive until i know it works. Also whre can i dload assist please.
SORRY for the lame questions struggling with all this.
Any help really is appreciated