I have a 20 gb 360. I have 8 gb left on hd. I only have halo and the only games i am getting in the future is halo odst & cod4 mdw2. I was wondering if odst & cod4 will need to be installed. (BTW I know installation is an option). Also is 8 gb on the hd enough space left to run the game smoothly? And i don’t want to get a bigger hd that is why I am asking this question.