How to boot Debian installer from PureBoot?

Thanks for that @NineX, so basically, if I want to run Kali linux, I need to do so from the Live USB installer?

Which is unfortunate as they got rid of that functionality some time ago (I tried to install Calamares seperatly on a live instance but was met with lots of errors as you can imagine).

I shall have to find a work around on my return. Thanks again for the help.