Make new folder in some partition or on USBkey, better don't use C: drive. Add this folder to your antivirus exclusion (is not needed but if dont work try it) and extract the program. Launch ghosts then in main screen BEFORE click "play online" run the haX in admin mode, click inject, after the window is closed return to ghosts and click online. Have fun...
Sometime you need to have installed .NETframework 4.5.1 and Redistributable package 2013 (both 32bit and 64bit), get it from MS site.