nero dc bootdisk

I went to burn the bootdisk for nero. It went like superfast, and when i went to put the cd in, it didn't work. i got the screen that shows the memory card, file, music, and settings....this is the second time this happend. where do i get one to burn the right image or am i doing something wrong or what. i just want a bootdisk so if someone can lead me in the right dir. that would be nice.
bye