I just came across this Linux distribution Damn Vulnerable Linux and downloaded the ISO file.i tried to run it directly with ISO image in VirtualBox.
But it message like
ioslinux 3.36 2007-02-10 copyright 1994-2007 h peter anvin isolinux:
boot:
(which I think points to non bootable media) and asking for kernel image. I mounted the iso file, then tried few files like vmlinuz in mounted directory but VM unable to find them and display another message
unable to find kernel image
Then I tried to burn image to DVD with NERO(bootable options). This time I am not getting any message at boot time. Just a blinking cursor for ever.
How to make a live DVD out of that iso?

superuser. Anyway check the downloaded file checksum. maybe it's corrupted. If it boots up on virtualbox, then it should boot when it's burned to a DVD. just for sure try other apps thanNero(ie.CloneCD). – fardjad Jan 22 '11 at 19:41