as far as the DS install, I would be sure the install is pointed to c:program files\red storm entertainment\ghost recon...the install should find the path by itself....perhaps for some reason DS is trying to install to some other destination....if the path looks ok, if it were me, I would uninstall GR, reinstall....run defrag....then try DS install......DS and IT are not stand alones and require GR to play..once DS and IT are installed, simply go to the MODS tab and activate them...then go to campaign, start a new campaign and select whichever one you want...as you complete missions in the cam