Just extract the contents of the attachment and load up Ground Combat when you put the Mirage Battlesuit on a soldier in the dropship. The soldier should look like a Praetor, but instead it looks like a darker and more comical version of a soldier in jackal armor...
If someone can figure out what I've been doing wrong here: please help--this is not my area of expertise when it comes to modding...
Here's the file:
http://www.goldhawkinteractive.com/forums/downloads.php?do=file&id=104