I was not in a position to need to do this, but I've read here and there that with the beta/release candidate/whatever, at least, it was pretty easy to extract

I was not in a position to need to do this, but I've read here and there that with the beta/release candidate/whatever, at least, it was pretty easy to extract the image file from its app packaging and burn that to a disk or slap it onto a bootable USB drive.