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Installation:
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2:Use OpenIV extract 
X:\Grand Theft Auto V\update\update.rpf\common\data\dlclist.xml 

then use a notepad to open it,add a new line 

		<Item>dlcpacks:\ar8\</Item>

Save it and use OpenIV to replace it. 
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3:Use OpenIV and extract 
X:\Grand Theft Auto V\update\update.rpf\common\data\extratitleupdatedata.meta 

then use a notepad to open it,add new line 

		<Item type="SExtraTitleUpdateMount">
			<deviceName>dlc_ar8:/</deviceName>
			<path>update:/dlc_patch/ar8/</path>
		</Item>

Save it and use OpenIV to replace it. 
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You can use Simple Trainer to Spawn it by name "arv10"
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That's all, Enjoy ! 