Instalation :
first you need to install
https://www.gta5-mods.com/scripts/menyoo-pc-sp
https://www.gta5-mods.com/scripts/map-editor
https://www.gta5-mods.com/tools/map-builder
You need these three files to load most of the interiors .

Next step is just put the file name ,, garage mirror ,, in
Grand Theft Auto V/menyooStuff/Spooner
and that's all .