From the readme:
4. Installation:
----------------------------------------------------------------------------------------------
**********************************************************************************************
- Extract the "Locke_AnimMOD" Folder from the Archive with its relative paths into
your Operation Flashpoint Main Directory.
None of your original files will be replaced.
- Now Make a new shortcut to your OFP Exe-File,
something like this (whithout the "):
   "C:\Games\OperationFlashpoint\FlashpointBeta.exe -mod=Locke_AnimMOD"
- Done, just Start OFP with the new Shortcut.
Or you can use it with different mods, for example:
C:\Games\OperationFlashpoint\FlashpointBeta.exe -mod=Y2K3 -mod=Locke_AnimMOD