It´s too difficult. It works at the first chapter only. After the tunnel is the last autosave of chapter one.
20000050 00000000
00000054 00000000
20000064 00000000
20000068 00000000
2000007C 00000000
20000080 00000000
20000094 00000000
20000098 00000000
0000009C 00000000