Today a friend of mine called me for burning a CD. The last CD I burned with GnomeBaker, which had to be installed before. Now I did not wanted to install an app first and to try what Ubuntu has to offer just out-of-the-box.
I inserted a blank CD and and a second later I had a icon on my desktop and nautilus popped up and showed me the blank CD-ROM. I just dragged to content to burn from the folder and dropped it on the CD-ROM-Icon. Then I just clicked the Write-to-disc-button, and after I configured the burning speed I could see the burning process.

There occurred no problems and the CD worked fine. Hmm I think since Windows XP there was a simple way to accomplish this task but I always had to install my old Nero Version ;-).
but how to burn a ISO to a cd in ubuntu?
Hmm I am not sure but I would try the reverse way of this: Recording an .iso-File in Ubuntu:
guru@guru-desktop:~$ cp MyCD.iso /dev/cdrom
Donno if it will work.. Else try GnomeBaker.
Right click the ISO and select ‘Write to Disk…’