Creating an Ubuntu installation image?

Question

ubuntu

Colleagues, good afternoon. There was a problem creating the Ubuntu installation image - the image will need to be installed on many clients, it is made from a working client using remastersys. But due to the peculiarities of the work (launching xorg with chrome in full screen) - the system is not installed, but only launched as a LiveCD.
What needs to be disabled so that the bootloader still installs ubuntu?
As a guess, can someone tell me - is there an image of the system in qcow, can it be driven into the LiveCD image and cloned from there to the client's hdd?