1- Download The Attachment.
(<<You will find it at the end of the thread) (Click on McDeliver v3_mpgh.net.zip text)
2- Create new folder in your desktop and name it whatever you want
3- Open the File (With WinRar or 7Zip) then extract BF3 Diamond.exe & BF3 Diamond.dll in the folder you created.
4- Run BF3 Diamond.exe as admin if you're Windows 7 / Vista user.
5- Open BF3 and you're done.