Is kodi another OS??
Is it able to support hardware gpu for playing video

I made a partition of ext 4 1 gb using gparted from puppy linux. After this i dont know what to do??

I installed raspbian through NOOBS. Now I need to install OPEN ELEC in same sd card in different partition without affecting any changes to my raspbian.
I tried via NOOBS but it showing Raspbian needs to reinstall. Is there any way to install OPEN ELEC in same sd card without removing raspbian