HELP WITH HALO no cd??!?!?!?! PLEASE

[Pucci Luda]

Ok guys i am a total noob to this stuff but when i download the file Halo v1.031 [ENGLISH] Fixed EXE and i read the instructions it just says replace thenew exe with the old exe

i dont know what this means, i know its funny but can someone help me out please

when i go to find the file i downloaded it is called dev-h131.rar

do i need to rename it or anything

PLEASE HELP A NOOB I REALLY NEED YOUR HELP

THANKS

HELP IS MUCH APRECIATED