diff --git a/G3DTest.vcproj b/G3DTest.vcproj
index 932a338..6804e0b 100644
--- a/G3DTest.vcproj
+++ b/G3DTest.vcproj
@@ -169,7 +169,6 @@
 			/>
 			<Tool
 				Name="VCLinkerTool"
-				AdditionalDependencies="Advapi32.lib"
 				OutputFile="./G3DTest-Debug.exe"
 				LinkIncremental="2"
 				SuppressStartupBanner="true"
diff --git a/Instance.cpp b/Instance.cpp
index 3872eba..e7d400f 100644
--- a/Instance.cpp
+++ b/Instance.cpp
@@ -14,6 +14,13 @@ Instance::Instance(void)
 	className = "BaseInstance";
 }
 
+Instance::Instance(const Instance &oinst)
+{
+	parent = oinst.parent;
+	name = oinst.name;
+	className = "BaseInstance";
+}
+
 void Instance::render(RenderDevice* rd)
 {
 	for(size_t i = 0; i < children.size(); i++)
diff --git a/Instance.h b/Instance.h
index f379d63..09dff67 100644
--- a/Instance.h
+++ b/Instance.h
@@ -5,6 +5,7 @@ class Instance
 {
 public:
 	Instance(void);
+	Instance(const Instance&);
 	virtual ~Instance(void);
 	std::string name;
 	virtual void render(RenderDevice*);
@@ -17,6 +18,7 @@ public:
 	void addChild(Instance*);
 	void removeChild(Instance*);
 	Instance* getParent();
+	Instance* clone() const { return new Instance(*this); }
 protected:
 	std::string className;
 	Instance* parent;  // Another pointer.
diff --git a/PhysicalInstance.cpp b/PhysicalInstance.cpp
index 8c72fad..85ceb6e 100644
--- a/PhysicalInstance.cpp
+++ b/PhysicalInstance.cpp
@@ -1,43 +1,48 @@
 #include "PhysicalInstance.h"
 #include "Globals.h"
-bool canCollide = true;
-bool anchored = false;
-Vector3 size;
-Vector3 position;
-Vector3 velocity;
-Vector3 rotVelocity;
 GLfloat vertecies[96];
-Surface top;
-Surface front;
-Surface right;
-Surface back;
-Surface left;
-Surface bottom;
-CoordinateFrame cFrame;
-Color3 color;
 bool changed = true;
 Box itemBox = Box();
 
-
 PhysicalInstance::PhysicalInstance(void)
 {
-	name = "Default PhysicalInstance";
+    name = "Default PhysicalInstance";
 	className = "Part";
 	canCollide = true;
 	anchored = true;
 	size = Vector3(2,1,4);
-	position = Vector3(0,0,0);
-	cFrame = CoordinateFrame(position);
+	setCFrame(CoordinateFrame(Vector3(0,0,0)));
 	color = Color3::gray();
 	velocity = Vector3(0,0,0);
 	rotVelocity = Vector3(0,0,0);
-	top = Snaps;
-	front = Smooth;
-	right = Smooth;
-	back = Smooth;
-	left = Smooth;
-	bottom = Inlets;
+	top = Surface::Smooth;
+    front = Surface::Smooth;
+    right = Surface::Smooth;
+	back = Surface::Smooth;
+	left = Surface::Smooth;
+	bottom = Surface::Smooth;
 }
+
+PhysicalInstance::PhysicalInstance(const PhysicalInstance &oinst)
+{
+	name = oinst.name;
+	className = "Part";
+	canCollide = oinst.canCollide;
+	
+	anchored = oinst.anchored;
+	size = oinst.size;
+	setCFrame(oinst.cFrame);
+	color = oinst.color;
+	velocity = oinst.velocity;
+	rotVelocity = oinst.rotVelocity;
+	top = oinst.top;
+	front = oinst.front;
+	right = oinst.right;
+	back = oinst.back;
+	left = oinst.left;
+	bottom = oinst.bottom;
+}
+
 void PhysicalInstance::setSize(Vector3 newSize)
 {
 	int minsize = 1;
@@ -127,6 +132,11 @@ Box PhysicalInstance::getBox()
 	return itemBox;
 }
 
+bool PhysicalInstance::collides(Box box)
+{
+	return CollisionDetection::fixedSolidBoxIntersectsFixedSolidBox(getBox(), box);
+}
+
 void PhysicalInstance::render(RenderDevice* rd)
 {
 	if(changed)
@@ -143,29 +153,17 @@ void PhysicalInstance::render(RenderDevice* rd)
 		double add = 0.8;
 		Surface face;
 		if(i == 0)//Back
-		{
 			face = back;
-		}
 		else if(i == 16)//Right
-		{
 			face = right;
-		}
 		else if(i == 32)//Front
-		{
 			face = front;
-		}
 		else if(i == 48)//Top
-		{
 			face = top;
-		}
 		else if(i == 64)//Left
-		{
 			face = left;
-		}
 		else if(i == 80)//Bottom
-		{
 			face = bottom;
-		}
 
 		/*if(face == Snaps)
 			add = 0.0;
diff --git a/PhysicalInstance.h b/PhysicalInstance.h
index 8fb4973..e7502a9 100644
--- a/PhysicalInstance.h
+++ b/PhysicalInstance.h
@@ -7,10 +7,11 @@ class PhysicalInstance :
 {
 public:
 	PhysicalInstance(void);
+	PhysicalInstance(const PhysicalInstance &oinst);
+	Instance* clone() const { return new PhysicalInstance(*this); }
 	~PhysicalInstance(void);
 	virtual void render(RenderDevice*);
 	Vector3 velocity;
-	Vector3 rotvelocity;
 	Surface top;
 	Surface front;
 	Surface right;
@@ -28,6 +29,10 @@ public:
 	CoordinateFrame getCFrameRenderBased();
 	Vector3 getSize();
 	void setSize(Vector3);
+	bool canCollide;
+	bool anchored;
+	Vector3 rotVelocity;
+	bool collides(Box);
 private:
 	Vector3 position;
 	Vector3 size;
diff --git a/Surface.h b/Surface.h
index 23b2be4..86ef867 100644
--- a/Surface.h
+++ b/Surface.h
@@ -1,4 +1,4 @@
 #ifndef SURFACE_H
 #define SURFACE_H
-enum Surface {Smooth, Snaps, Inlets, Glue, Weld, Hinge, Motor};
+static enum Surface {Smooth, Snaps, Inlets, Glue, Weld, Hinge, Motor};
 #endif
diff --git a/main.cpp b/main.cpp
index 15cddff..2734dcb 100644
--- a/main.cpp
+++ b/main.cpp
@@ -249,10 +249,16 @@ void GUDButtonListener::onButton1MouseClick(BaseButtonInstance* button)
 		AudioPlayer::playSound(dingSound);
 		if(button->name == "Duplicate")
 		{
-
+			std::vector<Instance*> newinst;
+			for(size_t i = 0; i < selectedInstances.size(); i++)
+			{
+				Instance* inst = selectedInstances.at(i)->clone();
+				newinst.push_back(inst);
+				inst->setParent(selectedInstances.at(i)->getParent());
+			}
+			selectedInstances = newinst;
 		}
 	}
-		
 }
 
 class RotateButtonListener : public ButtonListener {