I've had very little experience on it.... not enough to give you a satisfactory answer to be honest. Basically, if you wanted to run two OSes using HyperOS, you'll have to install it on the first OS, then install the new OS through the software. After that, you can drag & drop the new OS into however many partitions you like and run them for tests or whatever. I think in Release version 6, you can run the OS from HyperDrive (in other words, running the OS off RAM)