Installation:

1. Navigate to your Halo Reach maps directory.
"C:\Program Files (x86)\Steam\steamapps\common\Halo The Master Chief Collection\haloreach\maps"

2. Make a backup of the file "m70_bonus.map"

3. Replace the map file with the one you downloaded.

4. Start Halo MCC with EAC Disabled.

5. Start the campaign mission Lone Wolf.