I managed to build an arch iso with deepin desktop, I added an installer to the iso
I have tested it in virtualbox and on hardware, both install and working
Never thought I’d be able to do it, but it turns out its not that hard, unless I just got lucky but I doubt that!! lol
If anybody wants to test it for me and give feedback I will post a link. I do need to build a new iso for bare metal to remove the virtualbox-guest errors, but it does install fine.