How to make a livecd for my installed ubuntu server which can be used for installing?

Hi everyone,
I've got a well worked ubuntu server and now I need to make a livecd in order to copy the server to some other machines with the same hardware.
I've already make a livecd according to http://ubuntuforums.org/showthread.php?t=688872
I can boot from the livecd , but I can't install ubuntu server through it.
I just wanna a livecd like ubuntu-desktop,which provides an access to install the system without installing the packages one by one, by which I mean , I can use the livecd to install the system from filesystem.squashfs(which I made according to the tutorial above).


Any help that you could give would be greatly appreciated

Hi, have you met Clonezilla? :)

http://clonezilla.org/
http://sourceforge.net/projects/clonezilla/

Thanks a lot , I tried it and it works. Not only can it make a img, but also it allows me to make a install cd.
thanks again.