Popular remastering software, Remastersys, which was discontinued a few months ago has been revived and a new release has been added to the repository. The current release is 3.0 and supports 10.04, 10.10, 11.04 and 11.10 versions of Ubuntu and all its derivative operating systems.
UPDATE: As you can see from the screenshots, remastersys 3.0 has gone through as major overhaul in terms of UI, thus making it easier for users to change the settings.
To download the latest version of the software simply visit http://www.remastersys.com/repository/lucid/
on your browser and download the software. If you want to add the repository to your list of repositories then follow the steps.
1. Open Software Sources by pressing Alt+F2 and typing software-properties-gtk
2. Add deb http://www.remastersys.com/repository lucid/ to the list
And then update the repositories. Be Sure to uncheck the sources repository of remastersys (as shown below in the screenshot) as it will keep throwing up errors.
Once repositories are updated, install remastersys from Ubuntu Software Centre .
For command line :
sudo apt-get update && sudo apt-get install remastersys