Configurate Linux Iso-Image as bootable Thin-Client DVD

Hello Everyone :-)

I have to find a solution for the special needs of my company and now i getting struggle, i have the following problem.

The order: Create a bootable Linux DVD with special RDP settings.

We have many (not so) old computers and we want to recycle them as Thin-Client, but without any HD, therefore the Linux-DVD. The DVD should boot and after starting the Desktop the RDP-Connection should connection.

What i have done: - Write the RDP-Scripts to start with the desktop. - "Play" with mounting, sqaushfs and tools like remastersys

Where i struggle: Tools like remastersys don't suit me needs, i need special seetings (as explained). I try to customize a Ubuntu-Iso in this way that it start a desktop and then an RDP-Session. I used squashfs to extract the ISO but how do is customize it to use it as it need? Where i have to place the files and wrap it back to iso?

Thx for the help :-)

PS: plz don't consider my orthography :-)