Set AA Quality besides the other settings.

Hi, i want to know if it possible to manually set the Anti Aliasing quality level besides the selected quality level, for example: If I select Good Quality Level in my settings but I want to set AA to Enabled is that possible, obviously im talking about in-game settings, not editor, i know its possible in the editor if i set the preset to have AA enabled, but i want to be able to do it in code separately, how I need to do it if its possible. This is so far my code, i want to know if its good, before i develop any GUI for that.

 public static int[] LoadVideoSettings()
     {        
         int[] settings = new int[2];
         if(PlayerPrefs.HasKey("UnityGraphicsQuality"))
             currentVideoSetting = (PlayerPrefs.GetInt("UnityGraphicsQuality") >= 0 && PlayerPrefs.GetInt("UnityGraphicsQuality") < 6)?PlayerPrefs.GetInt("UnityGraphicsQuality"):0;
         else
         {
             PlayerPrefs.SetInt("UnityGraphicsQuality",0);
             currentVideoSetting = 0;
         }
         settings [0] = currentVideoSetting;
         
         if(PlayerPrefs.HasKey("AALevel"))
             currentAASetting = (PlayerPrefs.GetInt("AALevel") >= 0 && PlayerPrefs.GetInt("AALevel") < 9)?PlayerPrefs.GetInt("AALevel"):0;
         else        
         {
             PlayerPrefs.SetInt("AALevel",0);
             currentAASetting = 0;
         }
         settings [1] = currentAASetting;
         return settings;
     }
 
     public static void ApplyVideoSettings()
     {
         QualitySettings.SetQualityLevel (currentVideoSetting, true);
         QualitySettings.antiAliasing = currentAASetting;
     }