I have a Gateway laptop that I have to send in for repair. The LCD screen does not work even though the computer is booted up. I have some information on the laptop that is sensitive and I am required by law to protect the identify of my students. So before I send it in, I need to somehow shred the hard drive or at least format the drive so that my student's identity cannot be compromised according to Florida law. 
I have checked around and found some programs that can shred files but they require user input and its kind of hard to do with no LCD screen to see what prompts to type in. Deriks Boot and Nuke looks like what I need but there is no way to boot from CD to auto shred the disk. 
Does anyone know of any program that can auto shred upon boot from CD?
Thanks.