Install the latest map editor (I used 1.5). Put the XML in your main GTA directory. Load "FranklinsMansion" in Editor or you can change the name of the XML to whatever you want. 

https://www.gta5-mods.com/scripts/map-editor


My Chennel > https://www.youtube.com/channel/UCeJGVaVY_xa0l77XFrXafqg