In an age when I can use my current OS of choice to drag and drop as many megabytes of data as needed onto a drive and within seconds have an ISO9660 disk with 100% integrity and then start burning off flawless copy after flawless copy...
I admit, for a beta, this would be perfectly acceptable (I imagine) to most A1 users. For a release OS CD though, should be a nicely pressed copy though. For professionalism's sake.