installation:

before
download these mods:
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https://www.gta5-mods.com/vehicles/batman-vehicles-add-on-pack-894e21f9-8849-4522-ba65-676be935db41

https://www.gta5-mods.com/scripts/menyoo-pc-sp

https://www.gta5-mods.com/maps/the-batcave-2-0-addon-props

https://www.gta5-mods.com/tools/addonprops">AddonProps</a></li>

https://www.mediafire.com/file/tmcrbn46qmzarzd/scarecrow.rar/file

https://www.gta5-mods.com/scripts/enable-all-interiors-wip
------------------------
after you have installed these mods:

copy the file:
BATCAVE.xml
to the folder:
Grand Theft Auto V\menyooStuff\Spooner
*-------------
That's it
have a good time
^_^