Making a Small Music Mod for Monster Hunter World
NOTE: this guide is only for Monster Hunter World. The process for RE Engine games, while likely similar in concept, require editing of files whose structure is not yet fully understood.
This tutorial assumes you already have your wems made with proper settings, and have the IDs they are replacing at the ready.
Open the NPCK Editor and then select the "New" button. Import your wems, and assign them the proper ids for the audio you want them to replace. Then export the NPCK to any name you like.
Extract the bgm_cmn.wwct from your game (the path is common/sound), and open it in the WWCT Editor.
Here, add a new WWCT entry and set it to be a WWPK. Change the path to be where you want the WWPK to be in the files. Set the index to be one after the last of the WWPKs (in my case, 18).
Export the WWCT and place it in your nativePC at common/sound.
Note: the WWCT will need to be updated with any content patches that adds new NPCKs.
Open the WWBK/WWPK Editor, and create a new file. Edit the path to match that of your npck in nativePC, and then save your file. Make sure to save as a WWPK, and not as a WWBK.
After that, open the game and test!