Nope, that didn't feel right. Moving all those modules to Linden space.

OpenSim/Region/ClientStack/Linden/Caps/CapabilitiesModule.cs

@@ -31,6 +31,7 @@ using System.Collections.Generic;
 using System.Reflection;
 using log4net;
 using Nini.Config;
+using Mono.Addins;
 using OpenMetaverse;
 using OpenSim.Framework;
 using OpenSim.Framework.Console;
@@ -38,8 +39,9 @@ using OpenSim.Region.Framework.Interfaces;
 using OpenSim.Region.Framework.Scenes;
 using Caps=OpenSim.Framework.Capabilities.Caps;
 
-namespace OpenSim.Region.CoreModules.Capabilities
+namespace OpenSim.Region.ClientStack.Linden
 {
+    [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule")]
     public class CapabilitiesModule : INonSharedRegionModule, ICapabilitiesModule
     { 
         private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

OpenSim/Region/ClientStack/Linden/Caps/EventQueue/EventQueueGetModule.cs

@@ -33,6 +33,7 @@ using System.Reflection;
 using System.Threading;
 using log4net;
 using Nini.Config;
+using Mono.Addins;
 using OpenMetaverse;
 using OpenMetaverse.Messages.Linden;
 using OpenMetaverse.Packets;
@@ -53,6 +54,7 @@ namespace OpenSim.Region.ClientStack.Linden
         public OSDMap body;
     }
 
+    [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule")]
     public class EventQueueGetModule : IEventQueue, IRegionModule
     {
         private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

OpenSim/Region/ClientStack/Linden/Caps/GetMeshModule.cs

@@ -44,7 +44,7 @@ using OpenSim.Region.Framework.Scenes;
 using OpenSim.Services.Interfaces;
 using Caps = OpenSim.Framework.Capabilities.Caps;
 
-namespace OpenSim.Region.CoreModules.Capabilities
+namespace OpenSim.Region.ClientStack.Linden
 {
     [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule")]
     public class GetMeshModule : INonSharedRegionModule

OpenSim/Region/ClientStack/Linden/Caps/GetTextureModule.cs

@@ -35,6 +35,7 @@ using System.IO;
 using System.Web;
 using log4net;
 using Nini.Config;
+using Mono.Addins;
 using OpenMetaverse;
 using OpenMetaverse.StructuredData;
 using OpenMetaverse.Imaging;
@@ -46,7 +47,7 @@ using OpenSim.Region.Framework.Scenes;
 using OpenSim.Services.Interfaces;
 using Caps = OpenSim.Framework.Capabilities.Caps;
 
-namespace OpenSim.Region.CoreModules.Capabilities
+namespace OpenSim.Region.ClientStack.Linden
 {
     #region Stream Handler
 
@@ -70,6 +71,7 @@ namespace OpenSim.Region.CoreModules.Capabilities
 
     #endregion Stream Handler
 
+    [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule")]
     public class GetTextureModule : IRegionModule
     {
         private static readonly ILog m_log =

OpenSim/Region/ClientStack/Linden/Caps/NewFileAgentInventoryVariablePriceModule.cs

@@ -45,7 +45,7 @@ using OpenSim.Services.Interfaces;
 using Caps = OpenSim.Framework.Capabilities.Caps;
 using OpenSim.Framework.Capabilities;
 
-namespace OpenSim.Region.CoreModules.Capabilities
+namespace OpenSim.Region.ClientStack.Linden
 {
     [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule")]
     public class NewFileAgentInventoryVariablePriceModule : INonSharedRegionModule

OpenSim/Region/ClientStack/Linden/Caps/ObjectCaps/ObjectAdd.cs

@@ -39,7 +39,7 @@ using OpenSim.Region.Framework.Interfaces;
 using OpenSim.Region.Framework.Scenes;
 using Caps=OpenSim.Framework.Capabilities.Caps;
 
-namespace OpenSim.Region.CoreModules.Capabilities
+namespace OpenSim.Region.ClientStack.Linden
 {
     public class ObjectAdd : IRegionModule
     {

OpenSim/Region/ClientStack/Linden/Caps/ObjectCaps/UploadObjectAssetModule.cs

@@ -49,7 +49,7 @@ using OSDMap = OpenMetaverse.StructuredData.OSDMap;
 using OpenSim.Framework.Capabilities;
 using ExtraParamType = OpenMetaverse.ExtraParamType;
 
-namespace OpenSim.Region.CoreModules.Capabilities
+namespace OpenSim.Region.ClientStack.Linden
 {
     [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule")]
     public class UploadObjectAssetModule : INonSharedRegionModule

prebuild.xml

@@ -1524,7 +1524,9 @@
       <ReferencePath>../../../../bin/</ReferencePath>
       <Reference name="System"/>
       <Reference name="System.Core"/>
+      <Reference name="System.Drawing"/>
       <Reference name="System.Xml"/>
+      <Reference name="System.Web"/>
       <Reference name="OpenMetaverseTypes" path="../../../../bin/"/>
       <Reference name="OpenMetaverse.StructuredData" path="../../../../bin/"/>
       <Reference name="OpenMetaverse" path="../../../../bin/"/>
@@ -1540,7 +1542,7 @@
       <Reference name="OpenSim.Region.ClientStack"/>
       <Reference name="OpenSim.Region.Physics.Manager"/>
       <Reference name="OpenSim.Services.Interfaces"/>
-      <Reference name="XMLRPC" path="../../../../bin/"/>
+      <Reference name="Mono.Addins" path="../../../bin/"/>
       <Reference name="Nini" path="../../../../bin/"/>
       <Reference name="log4net" path="../../../../bin/"/>
       <Reference name="C5" path="../../../../bin/"/>