Well, coming from the prehistoric era of DOS, hehe, it came to me as a possibility... for example, I still use a bootable cd that comes with Norton Ghost and creates a small memory drive at boot time to load the required files.
You are right about the OS! The link you provide also considers a linux cd. I think that with some playing around (with initrd?) the ramdisk could then be created.
Maybe the following link could be of some help: