I recently received my new hard drive in the mail and put it into my dell computer (inspiron E1505). I have the windows vista install cd and I put that into my CD/DVD external drive and connected it by usb. How to I get my computer to boot from this external drive? I have already tried changing the bios to booting from usb and booting from CD/DVD. I get the message "no bootable devices" no matter what I try. Have I missed a step for installing vista? Please help!