You need the deamon tool to convert the ISO to a bootable CD
http://www.daemon-tools.cc/dtcc/portal/download.php?sid=e598b92f60c064f83a44906ddbde094a
also, try Sonic CD tool. I like it alot better than Nero or Roxio
Another (XP only) option is the ISO Recorder Power Toy at http://isorecorder.alexfeinman.com/isorecorder.htm With it you simply right click the iso and select burn to cd.