you could always make your own round cables for CDRW. I've never been able to do it properly with udma/66/100/133 cables, but for standard IDE cables it's simple and educational. Simply take a razor blade and make a small slit in the gap between lines about every 5 lines, then pull them apart (pulling apart means less chance of cutting something your not suppose to). Then take some plastic ties or electrical tape, and you got nice neat cables! It's kinda fun, and very easy to do, make you feel l334.
for more info: http://www.omegacorner.com/old/oldtips.htm