INSTALLATION:

Just drag and drop "aaarollsroycedealer" folder at: D:\Grand Theft Auto V\mods\update\x64\dlcpacks


then simply add this line to you dlclist.xml located at: D:\Grand Theft Auto V\mods\update\update.rpf\common\data:

<Item>dlcpacks:\aaarollsroycedealer\</Item>

Optional:

If you want peds in the dealership, there's a menyoo file for it. In optional folders, drag and drop "RollsRoycePeds.xml" at: E:\Grand Theft Auto V\menyooStuff\Spooner