Open Brasero, select "Burn an image to disk", click the button to choose a file, it will open a window to choose the file, which filters by default the files that can be burnt.
The problem is that this filter does not show .NRG images , so I have to select "Show all files" to make the .NRG image appear, then select it. (for information then Brasero manages to burn it with success).
On Ubunu 11.10
Open Brasero, select "Burn an image to disk", click the button to choose a file, it will open a window to choose the file, which filters by default the files that can be burnt.
The problem is that this filter does not show .NRG images , so I have to select "Show all files" to make the .NRG image appear, then select it. (for information then Brasero manages to burn it with success).