SOMEONE PLZ PLZ PLZ PLZ PLZ PLZ PL Z PLZ HELP ME WITH HALO PC !!!!!!!!!!!!!!!!!!

plz you have to help me i have downloaded the 2 files off http://halo.bungie.net/site/halo/features/halopc.html
but i dont know what to do after that. When i click on play it just goes onto a black page with loads of writing on it!!!

IM SOOO CONFUSED HEELLLLLLLP MEEEEEEEEEEEEEEEEEE !!!!!!!!! please

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