JP-Schindler’s Devin Weston Mansion V2 is a historical GTA V Map Editor scene from November 2017. Its documented installation uses single-player XML and an ASI tool; it is not a documented drop-in FiveM MLO.
Use the exact source filenames
The creator names gtamp-unlock-all-objects.asi and Devin_Weston_Mansion.xml in the GTA V main directory, with Map Editor required. Confirm that the required tools support your game edition before using this older procedure. Back up affected files and use a separate modding installation.
Account for documented defects
The listing reports camera-related visual glitches near exterior walls and the aquarium, plus an invisible wall near the entrance overpass and office. V2 adds showers and a function room; it does not establish that every door or interior interaction works.
Walk the entrance and office routes and inspect the aquarium from different camera angles. For FiveM, obtain a documented compatible resource and check conversion permissions rather than copying the ASI into server resources. Remove the scene and restore the prior files if access or rendering fails.