Well, my rating isn't really objective, because these instructions don't fit with the Mac version of Aleph One :( If Anyone can help me, hit me up at Skype: IIPOTECT Email: maksimkopeikin@gmail.com
These files will allow you to extract and implement all HD sprites and textures from the XBox Live Arcade version of Marathon:Durandal into your AlephOne installation of Marathon 2.
Detailed instructions on how to get it working can be found in the included ReadMe file.
This was made possible thanks to the combined efforts of Treellama and thedoctor45.
Hope you enjoy.