Graphical CD/DVD Image (ISO file) Editor - ISO Master

ISO Master is an easy to use GUI CD image editor for Linux, BSD, and Windows. Basically, you can use this program to extract files from an ISO, add files to an ISO, and create bootable ISOs, all in a graphical user interface.

ISO Master can open both ISO and NRG files, but can only save as ISO. It is based on bkisofs, a library for reading, modifying, and writing ISO images.

ISO Master features:
* Display file/directory contents of the image and filesystem in two panels and be able to navigate them.
 * Display file sizes for files on image/filesystem.
 * Sort by name or by size
 * Select any number of items in the file browsers.
 * Extract selected from image to the filesystem
 * Delete selected from image.

ISO Master Installation:
To install in Ubuntu 10.10, open the terminal and type:

sudo add-apt-repository ppa:ferramroberto/maverick
sudo apt-get update
sudo apt-get install isomaster

After successful installation, you can open the ISO Master from
Application > Sound & Video > ISO Master

Now, to open ISO Image, go to File > Open and select the ISO Image. You will be able to see its contents in bottom window of ISO Master.

Now, to add some file or folder select the particular file or folder and click Add.

Similarly to Remove some file or folder,  select the particular file and folder from bottom window and click Remove.

And, finally save your changes to build new ISO file.