not sure if this has been posted
so soz if it has
found it on overclockers forum
http://forums.overclockers.co.uk/showthread.php?t=17761729
the file to edit is here:
C:\Program Files\Ubisoft\Ghost Recon Advanced Warfighter 2\Settings\profiles\(your name)\settings.xml
and there are 2 lines to change, they are:
<has_physx value="false" />
<physics value="0" />
change them to 'true' and either '1' for high physics or '2' for extreme
[Merged with existing thread]
oops i see it has