Some real quick questions.

[JohnLocke]

First off hello everyone.I have both halo combat evolved and custom edition however there is nothing different inside custom edition.

I suppose the difference is that i can download custom maps and stuff for it? -(1)-

In the following video besides the player is using a spartan laser in campaign mode, banshees seem to explode just like they do in halo 2. http://www.youtube.com/watch?v=SulmdVKeOvs
I can understand that in a custom map you can find custom vehicles and stuff, but is something like this really possible? -(2)-


In this video http://www.xfire.com/video/86878/ the user is playing halo CE but hell its looks almost exactly like halo2
( only by explosions and other stuff you can understand its halo 1).
Can the modding be so extreme?I mean it seems that the graphics are like 80% better! -(3)-


Can i find all these stuff in the Halo CE forum in this site? -(4)-

These are like my 4 "main questions"
Thanks to anyone taking the time to reply.