If your dvd drive only flashes once as you stated then what you saw on there were the files for bootmii as an ios. If you have bootmii installed as boot2 your disc drive will flash twice quickly when you power on. If you don't have this or preloader you're between a rock and a hard place... with another rock stacked on top of you. Sorry, Man. If you DO have boot2 installed then there's still hope. Triple check.