The question was edited to contain further information while I was writing my first reply above:
6. anything the artist would create for said game I want to remain property of said game and not have the artist be able to some day say to me if I use their art they would sue me or something.
7. This would be for an indie non paid job. I want to work as a team with someone that's interested in the project I'm doing, but I also don't want to lose potentially months of work if the artist one day up and quits and tells me I'm not allowed to use the art they created for the game.
6. An NDA is nowhere near enough for what you want to do, then.
7. You need a collaboration agreement. Look for Mona Ibrahim's excellent article on collaboration agreements at http://maientertainmentlaw.com/ (I'd give you a precise location, but it keeps changing*). And read http://sloperama.com/advice/article58.htm
*Edit: The article was written in November 2008 - you can find it under Archives/2008 and also under Topics/Contracts.