Hello there, I really wanted to check out some of the mods on the games above. If you get some good mods, Please don't hesitate to PM them to me. If you cannot, Please give me a link that I can use to find them.

Try just typing "halo mod" into the various search engines on the web. First one I got:

http://www.halomods.com/

They have a forum where they could give you much more specialised help.