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It have bad instruction at the ReadMe text
1:Copy update folder to
X:\Grand Theft Auto V\
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2:Use OpenIV extract
X:\Grand Theft Auto V\update\update.rpf\common\data\dlclist.xml
then use notepad open it,add new line

<item>dlcpacks:\mgt\</item>

Save it and use OpenIV replace it.
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The correct instruction is to copy mgt folder to Grand Theft Auto V\mods\update\x64\dlcpacks and paste.
after open OpenIV : GTAV>mods>update>update.rpf>common>data and copy paste dlclist.xml to desktop and then use notepad open it,add new line

<item>dlcpacks:\mgt\</item>

save it and copy paste again to the OpenIV where u got before.
It will work and will spawn by name MGT.
I had my doubt for the instruction and i did like this and IT WORKS.

Good mods by the way.