I'm working on a project to make my pi mobile with about 4 or so operating systems ready to boot. There's always the option to switch sd cards for each and every os but noobs and berryboot makes life so much easier. However I would like to know how I could download a particular os onto a jumpdrive on berryboot similar to noobs. I could use noobs but the problem is that it doesn't have half of the operating systems that I want and berryboot has all of them. NOTE: I have 4 32gb jump drives to use specifically for this project and my question is how I can put, say, Kali Linux on one drive and retropie on another and openELEC on another using berryboot.
Thank you for ANY help in advance!