в архиве же все написано
Installation Instructions:
1) Extract the archive.
2) Insert the Halo 2 DVD
3) Run Startup.exe on the Halo 2 DVD using the included Loader.exe
Ie.: Loader.exe D

Startup.exe
4) Install the game.
5) Install XLiveRedist1.0.6027.msi and vcredist.msi from the \redists dir on the Halo 2 DVD.
6) Copy the following files into the directory you installed Halo 2:
dwmapi.dll, mf.dll, MFPlat.dll
7) Finished. To play the game, run halo2.exe using the included Loader.exe
Ie.: Loader.exe "C

Program Files\Microsoft Games\Halo 2\halo2.exe