The ISO file contains those folders. Perhaps you thought the .iso was a .rar because it opened like a RAR archive (many archiving software can also extract ISO files), or renamed it?
You should just be able to use any DVD burning software such as ImgBurn
on Windows or K3b on Linux, to burn the downloaded file to disc. At least you should not try to copy those files and folders inside to a disk - that way it won't work.
Registered Linux User #528502
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