diff --git a/LEGO1/lego/legoomni/include/registrationbook.h b/LEGO1/lego/legoomni/include/registrationbook.h
index 4a7f3ee8..aeede1d0 100644
--- a/LEGO1/lego/legoomni/include/registrationbook.h
+++ b/LEGO1/lego/legoomni/include/registrationbook.h
@@ -33,6 +33,27 @@ public:
 
 	// SYNTHETIC: LEGO1 0x10076f30
 	// RegistrationBook::`scalar deleting destructor'
+
+private:
+	undefined4 m_unk0xf8;        // 0xf8
+	undefined m_unk0xfc;         // 0xfc
+	undefined m_unk0xfd[3];      // 0xfd
+	undefined m_unk0x100[0x68];  // 0x100
+	undefined m_unk0x168[0x118]; // 0x168
+	struct {
+		undefined4 m_unk0x00[3]; // 0x00
+		undefined2 m_unk0x0c;    // 0x0c
+		undefined2 m_unk0x0e;    // 0x0e
+	} m_unk0x280;                // 0x280
+	undefined m_unk0x290[0x28];  // 0x290
+	undefined2 m_unk0x2b8;       // 0x2b8
+	undefined4 m_unk0x2bc;       // 0x2bc
+	undefined m_unk0x2c0;        // 0x2c0
+	undefined m_unk0x2c1;        // 0x2c1
+	undefined m_unk0x2c2[0x02];  // 0x2c2
+	undefined4 m_unk0x2c4;       // 0x2c4
+	undefined4 m_unk0x2c8;       // 0x2c8
+	undefined4 m_unk0x2cc;       // 0x2cc
 };
 
 #endif // REGISTRATIONBOOK_H
diff --git a/LEGO1/lego/legoomni/src/gasstation/gasstation.cpp b/LEGO1/lego/legoomni/src/gasstation/gasstation.cpp
index 37ff261e..36e48f56 100644
--- a/LEGO1/lego/legoomni/src/gasstation/gasstation.cpp
+++ b/LEGO1/lego/legoomni/src/gasstation/gasstation.cpp
@@ -5,16 +5,16 @@
 // FUNCTION: LEGO1 0x100046a0
 GasStation::GasStation()
 {
-	this->m_unk0xf8 = 0;
-	this->m_unk0x100 = 0;
-	this->m_unk0xfc = 0;
-	this->m_unk0x108 = 0;
-	this->m_unk0x104 = 0;
-	this->m_unk0x114 = 0;
-	this->m_unk0x106 = 0;
-	this->m_unk0x10c = 0;
-	this->m_unk0x115 = 0;
-	this->m_unk0x110 = 0;
+	m_unk0xf8 = 0;
+	m_unk0x100 = 0;
+	m_unk0xfc = 0;
+	m_unk0x108 = 0;
+	m_unk0x104 = 0;
+	m_unk0x114 = 0;
+	m_unk0x106 = 0;
+	m_unk0x10c = 0;
+	m_unk0x115 = 0;
+	m_unk0x110 = 0;
 
 	NotificationManager()->Register(this);
 }
diff --git a/LEGO1/lego/legoomni/src/infocenter/registrationbook.cpp b/LEGO1/lego/legoomni/src/infocenter/registrationbook.cpp
index 5d5c6d94..f4b17194 100644
--- a/LEGO1/lego/legoomni/src/infocenter/registrationbook.cpp
+++ b/LEGO1/lego/legoomni/src/infocenter/registrationbook.cpp
@@ -1,11 +1,31 @@
 #include "registrationbook.h"
 
 #include "legoomni.h"
+#include "mxnotificationmanager.h"
 
-// STUB: LEGO1 0x10076d20
-RegistrationBook::RegistrationBook()
+DECOMP_SIZE_ASSERT(RegistrationBook, 0x2d0)
+
+// FUNCTION: LEGO1 0x10076d20
+RegistrationBook::RegistrationBook() : m_unk0xf8(0x80000000), m_unk0xfc(1)
 {
-	// TODO
+	memset(m_unk0x100, 0, sizeof(m_unk0x100));
+	memset(m_unk0x168, 0, sizeof(m_unk0x168));
+
+	// Maybe not be part of the struct, but then it would need packing
+	m_unk0x280.m_unk0x0e = 0;
+
+	memset(m_unk0x290, 0, sizeof(m_unk0x290));
+	memset(&m_unk0x280, -1, sizeof(m_unk0x280) - 2);
+
+	m_unk0x2b8 = 0;
+	m_unk0x2bc = 0;
+
+	NotificationManager()->Register(this);
+
+	m_unk0x2c1 = 0;
+	m_unk0x2c4 = 0;
+	m_unk0x2c8 = 0;
+	m_unk0x2cc = 0;
 }
 
 // STUB: LEGO1 0x10076f50