Live-Build a Multi Arch Debian ISO with live desktop

[GSM PakOS <gsm.pakos@gmail.com>]

Hello dear Sir, I am trying to make a multi arch live ISO , With live lxqt desktop with my choice of software. Where can I find the base scripts for 

1. Building a multi arch ISO

2. A multi arch ISO with a live squashfs based file.

My debian respin named PakOS is available on 
https://sourceforge.net/projects/pakos/

However I build the whole thing by chrooting into the i386 squashfs, not an elegant solution. If a base script is available anywhere, please point me to.it. Thx. 

gSM