Want guards to investigate suspicious noises from farther away? Want civilians to actually call the police instead of cowering for two seconds? These require patching the NPC_Behaviour.def file.

"Do not use the definition patcher to unlock paid DLC or escalate scores on the leaderboards."

Pseudo-code:

It essentially rewires the game's internal logic for how it views your DLC ownership.

If your game crashes after patching, it’s likely not the Patcher's fault, but a conflict between two mods trying to overwrite the same game resource. The Modern Alternative: Simple Mod Framework