This is a more advanced and less common area of RE4 modding, but it does exist. A mod like "Resident Evil 4 World S" is a prime example, boasting "all new custom maps, new enemies, new scenario, new puzzles," essentially creating an entirely new campaign.
Some believe 161 was a "layout bin garbage collector"—a temporary holding cell where the engine would dump unloaded room data to prevent memory leaks. The candle? A debugging marker left by a programmer. The number? A self-reference to remind them which bin not to delete. layout bin resident evil 4 161
Resident Evil 4 modding, the layout.bin file (specifically ) is a critical data file used by modders to manipulate in-game assets and world layouts. Overview of Layout Bin 161 This is a more advanced and less common