Implementation

Copy HG folder to your mission root directory
Copy stringtable.xml (or merge with yours)
Copy initPlayerLocal.sqf (or merge with yours)
Copy initPlayerServer.sqf (or merge with yours)
Copy initServer.sqf (or merge with yours)

Open your description.ext & add this at the end:

#include "HG\UI\HG_DialogsMaster.h"

class RscTitles
{
    #include "HG\UI\Dialogs\HG_HUD.h"
    #include "HG\UI\Dialogs\HG_Tags.h"
};

class CfgClient
{
    #include "HG\Config\HG_Config.h"
};

class CfgSounds
{
    #include "HG\Sounds\HG_Sounds.h"
};

class CfgFunctions 
{
    #include "HG\Functions\HG_Functions.h"
};

Note: If your already have a description.ext just copy the relevant parts