jPV wrote:
But doesn't that make new copy from filesystem level (adds all the files from the CD) instead of raw copying whole CD no matter what it contains?

I quickly tried yesterday to use that copy cd function and I renamed the temp image before it deleted it, but it didn't seem to be standard ISO compatible file, because mounting it resulted messed up disc name and directory listing. So it seems that read ISO file from disc option is maybe missing.... unless Jaca has some tip to tell :)