I reinstalled Raspbian OS many times trying to get the OpenCV libraries up and running. Now I'd like to add OSMC in a seperate partition without lossing the Raspian partition and the previously added programs and libraries. I have downloaded a partition editor I've used before, GPARTED, to look at it's docs. So... before I start... Can NOOBS add a new OS non-destructfully? Is GPARTED suitable for shrinking and adding partitions? If I use it,how can I download the entire OSMC OS?