DC Boot CD

I have downloaded the image in all formats for the DC boot CD, when I try to burn them with my Ricoh CD writer...it doesn't work. Am I doing something wrong? Someone please help me, if I can't get it right I will just have to buy it :-( Also anyone know of any good sites with DC Roms for download?

P.S. I downloaded the images from www.dccopyworld.com site
email: wwf_rock_2000********com

Thanks