If you prefer an automated tool, you can use the Package-Definition-Patcher on GitHub.
While several versions exist, the most widely recognized and verified versions are: hitman 3 package definition patcher verified
If you prefer a local tool, the on GitHub by hardware is the gold standard: If you prefer an automated tool, you can
The is a maintenance tool, lacking the glamour of high-resolution texture mods or new gameplay features. However, it is arguably the most vital tool in the ecosystem. By verifying the patcher, the community ensures that the game remains customizable and that the extensive library of user-created content survives the constant evolution of the live-service game. By verifying the patcher, the community ensures that
Note: Alternatively, you can use the or the online web-patcher tools hosted by the Hitman modding community, which allow you to drag and drop your text file to patch it instantly.
If you want to dive deeper into custom maps or suits, let me know: