Hi all,
I need some help understanding how to use the many various patches for the game Halo: Combat Evolved. I downloaded the game from the Micro$oft Web site, tried a few of the patches but none seem to work. Perhaps the patches don’t work with the Micro$oft’s games. Also I found some serials for this game, but there seem to be nowhere in the game to use these serials.

Is there anywhere else I could download this game and try the serials or a patch for it?
Also which patch? Way too many v.

Thanks in advance for your help