diff --git a/LEGO1/mxdschunk.cpp b/LEGO1/mxdschunk.cpp
index 83a2d914..489a1611 100644
--- a/LEGO1/mxdschunk.cpp
+++ b/LEGO1/mxdschunk.cpp
@@ -6,16 +6,16 @@ DECOMP_SIZE_ASSERT(MxDSChunk, 0x1c);
 MxDSChunk::MxDSChunk()
 {
 	m_flags = 0;
-	m_unk18 = NULL;
+	m_data = NULL;
 	m_unk0c = -1;
 	m_time = 0;
-	m_unk14 = 0;
+	m_length = 0;
 }
 
 // OFFSET: LEGO1 0x100be170
 MxDSChunk::~MxDSChunk()
 {
 	if (m_flags & Flag_Bit1) {
-		delete[] m_unk18;
+		delete[] m_data;
 	}
 }
diff --git a/LEGO1/mxdschunk.h b/LEGO1/mxdschunk.h
index 1fe00460..e626d70b 100644
--- a/LEGO1/mxdschunk.h
+++ b/LEGO1/mxdschunk.h
@@ -31,21 +31,27 @@ class MxDSChunk : public MxCore {
 		return !strcmp(name, MxDSChunk::ClassName()) || MxCore::IsA(name);
 	}
 
+	inline void SetTime(MxLong p_time) { m_time = p_time; }
+	inline void SetLength(MxU32 p_length) { m_length = p_length; }
+	inline void SetData(MxU8* p_data) { m_data = p_data; }
+
 	inline MxU16 GetFlags() { return m_flags; }
 	inline MxLong GetTime() { return m_time; }
+	inline MxU32 GetLength() { return m_length; }
+	inline MxU8* GetData() { return m_data; }
 
-	inline void ReleaseUnk18()
+	inline void Release()
 	{
-		if (m_unk18)
-			delete[] m_unk18;
+		if (m_data)
+			delete[] m_data;
 	}
 
 private:
 	MxU16 m_flags;      // 0x8
 	undefined4 m_unk0c; // 0xc
 	MxLong m_time;      // 0x10
-	undefined4 m_unk14; // 0x14
-	MxU8* m_unk18;      // 0x18
+	MxU32 m_length;     // 0x14
+	MxU8* m_data;       // 0x18
 };
 
 #endif // MXDSCHUNK_H
diff --git a/LEGO1/mxmediapresenter.cpp b/LEGO1/mxmediapresenter.cpp
index ae18354c..4e25cc25 100644
--- a/LEGO1/mxmediapresenter.cpp
+++ b/LEGO1/mxmediapresenter.cpp
@@ -2,6 +2,7 @@
 
 #include "mxautolocker.h"
 #include "mxstreamchunk.h"
+#include "mxtimer.h"
 
 DECOMP_SIZE_ASSERT(MxMediaPresenter, 0x50);
 
@@ -46,7 +47,7 @@ void MxMediaPresenter::Destroy(MxBool p_fromDestructor)
 			MxStreamChunk* chunk;
 
 			while (cursor.Next(chunk))
-				chunk->ReleaseUnk18();
+				chunk->Release();
 
 			delete m_chunks;
 		}
@@ -123,7 +124,7 @@ void MxMediaPresenter::StreamingTickle()
 				m_currentTickleState = TickleState_Repeating;
 			}
 			else if (m_action->GetFlags() & MxDSAction::Flag_Looping) {
-				VTable0x58(m_currentChunk);
+				AppendChunk(m_currentChunk);
 
 				if (!MxPresenter::IsEnabled()) {
 					m_subscriber->FUN_100b8390(m_currentChunk);
@@ -166,10 +167,24 @@ void MxMediaPresenter::DoneTickle()
 	EndAction();
 }
 
-// OFFSET: LEGO1 0x100b6030 STUB
+// OFFSET: LEGO1 0x100b6030
 void MxMediaPresenter::Enable(MxBool p_enable)
 {
-	// TODO
+	if (MxPresenter::IsEnabled() != p_enable) {
+		MxPresenter::Enable(p_enable);
+
+		if (p_enable) {
+			MxLong time = Timer()->GetTime();
+			m_action->SetUnkTimingField(time);
+			SetTickleState(TickleState_Repeating);
+		}
+		else {
+			if (m_cursor)
+				m_cursor->Reset();
+			m_currentChunk = NULL;
+			SetTickleState(TickleState_Done);
+		}
+	}
 }
 
 // OFFSET: LEGO1 0x100b5700
@@ -208,8 +223,16 @@ void MxMediaPresenter::EndAction()
 	// TODO
 }
 
-// OFFSET: LEGO1 0x100b5f10 STUB
-void MxMediaPresenter::VTable0x58(MxStreamChunk* p_chunk)
+// OFFSET: LEGO1 0x100b5f10
+void MxMediaPresenter::AppendChunk(MxStreamChunk* p_chunk)
 {
-	// TODO
+	MxStreamChunk* chunk = new MxStreamChunk;
+
+	MxU32 length = p_chunk->GetLength();
+	chunk->SetLength(length);
+	chunk->SetData(new MxU8[length]);
+	chunk->SetTime(p_chunk->GetTime());
+
+	memcpy(chunk->GetData(), p_chunk->GetData(), chunk->GetLength());
+	m_chunks->Append(chunk);
 }
diff --git a/LEGO1/mxmediapresenter.h b/LEGO1/mxmediapresenter.h
index 4fb35f7b..3706b225 100644
--- a/LEGO1/mxmediapresenter.h
+++ b/LEGO1/mxmediapresenter.h
@@ -35,7 +35,7 @@ class MxMediaPresenter : public MxPresenter {
 	virtual MxResult StartAction(MxStreamController*, MxDSAction*) override; // vtable+0x3c
 	virtual void EndAction() override;                                       // vtable+0x40
 	virtual void Enable(MxBool p_enable) override;                           // vtable+0x54
-	virtual void VTable0x58(MxStreamChunk* p_chunk);                         // vtable+0x58
+	virtual void AppendChunk(MxStreamChunk* p_chunk);                        // vtable+0x58
 
 protected:
 	MxDSSubscriber* m_subscriber;      // 0x40
diff --git a/LEGO1/mxstreamchunk.h b/LEGO1/mxstreamchunk.h
index 92d7094e..f31f891a 100644
--- a/LEGO1/mxstreamchunk.h
+++ b/LEGO1/mxstreamchunk.h
@@ -6,6 +6,9 @@
 // VTABLE 0x100dc2a8
 // SIZE 0x20
 class MxStreamChunk : public MxDSChunk {
+public:
+	inline MxStreamChunk() : m_unk1c(NULL) {}
+
 	// OFFSET: LEGO1 0x100b1fe0
 	inline virtual const char* ClassName() const override // vtable+0xc
 	{
@@ -19,6 +22,7 @@ class MxStreamChunk : public MxDSChunk {
 		return !strcmp(name, MxStreamChunk::ClassName()) || MxDSChunk::IsA(name);
 	}
 
+private:
 	void* m_unk1c; // 0x1c
 };