Configuration Changes

StandaloneCommon.ini

[LoginService]
   ... 
   SRV_FriendsServerURI = "http://127.0.0.1:9000"
   SRV_IMServerURI = "http://127.0.0.1:9000"

Robust.HG.ini

[Startup]
 ServiceConnectors="...,8002/OpenSim.Server.Handlers.dll:HGFriendsServerConnector,8002/OpenSim.Server.Handlers.dll:InstantMessageServerConnector"

[LoginService]
   ... 
   SRV_FriendsServerURI = "http://127.0.0.1:8002"
   SRV_IMServerURI = "http://127.0.0.1:8002"

[UserAgentService]
   ...
   PresenceService	= "OpenSim.Services.PresenceService.dll:PresenceService"
   FriendsService	= "OpenSim.Services.FriendsService.dll:FriendsService"
   UserAccountService = "OpenSim.Services.UserAccountService.dll:UserAccountService"

Add these new sections at the end:

[HGFriendsService]
   LocalServiceModule = "OpenSim.Services.FriendsService.dll:FriendsService"
   UserAgentService = "OpenSim.Services.HypergridService.dll:UserAgentService"

[HGInstantMessageService]
   LocalServiceModule = "OpenSim.Services.HypergridService.dll:HGInstantMessageService"
   GridService = "OpenSim.Services.GridService.dll:GridService"
   PresenceService	= "OpenSim.Services.PresenceService.dll:PresenceService"
   UserAgentService = "OpenSim.Services.HypergridService.dll:UserAgentService"

GridCommon.ini

Add this section at the end:

[UserAgentService]
   ;
   ; === HG ONLY ===
   ; Change this to your user agent server (HG robust)
   ;
   UserAgentServerURI = "http://mygridserver.com:8002"

Troubleshooting

If you get an exception like this:

23:16:24 - [LLOGIN SERVICE]: Exception processing login for BlueWall Slade: System.ArgumentException: Object type System.Guid cannot be converted to target type: System.String
Parameter name: val
 at System.Reflection.MonoField.SetValue (System.Object obj, System.Object val, BindingFlags invokeAttr, System.Reflection.Binder binder,  System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
 at System.Reflection.FieldInfo.SetValue (System.Object obj, System.Object value) [0x00000] in <filename unknown>:0
 at OpenSim.Data.MySQL.MySQLGenericTableHandler`1[OpenSim.Data.FriendsData].DoQuery (MySql.Data.MySqlClient.MySqlCommand cmd) [0x00000] in <filename unknown>:0
 at OpenSim.Data.MySQL.MySqlFriendsData.GetFriends (UUID principalID) [0x00000] in <filename unknown>:0
 at OpenSim.Services.Friends.FriendsService.GetFriends (UUID PrincipalID) [0x00000] in <filename unknown>:0 

Try adding this to your database connection string: ConnectionString = "Data Source=localhost;Database=opensim;User ID=opensim;Password=*****;Old Guids=true;"