To install this you need to make a folder called spikedclub (all lowercase) inside: Gta5/mods/update/x64/DLCPACKS<-- 
then extract the dlc.rpf from the spikedclub folder thats inside this archive and put it into the folder you just created
MAKE SURE IT IS ALL LOWERCASE.

Then you need to navigate to: Gta5/mods/update/update.rpf/common/DATA<-- and then find the file called dlclists.xml 
and copy it to your desktop and add this line to your dlc's list

<Item>dlcpacks:\spikedclub\</Item>


Now your dlclist.xml should look like this (if you have cracked gta dont mind all the extra dlc's)






<?xml version="1.0" encoding="UTF-8"?>

<SMandatoryPacksData>
	<Paths>
  		<Item>platform:\dlcPacks\mpBeach\</Item>
		<Item>platform:\dlcPacks\mpBusiness\</Item>
		<Item>platform:\dlcPacks\mpChristmas\</Item>
		<Item>platform:\dlcPacks\mpValentines\</Item>
		<Item>platform:\dlcPacks\mpBusiness2\</Item>
		<Item>platform:\dlcPacks\mpHipster\</Item>
		<Item>platform:\dlcPacks\mpIndependence\</Item>
		<Item>platform:\dlcPacks\mpPilot\</Item>
		<Item>platform:\dlcPacks\spUpgrade\</Item>
		<Item>platform:\dlcPacks\mpLTS\</Item>
		<Item>dlcpacks:\mpheist\</Item>		
		<Item>dlcpacks:\mppatchesng\</Item>
		<Item>dlcpacks:\patchday1ng\</Item>
		<Item>dlcpacks:\patchday2ng\</Item>
		<Item>dlcpacks:\mpchristmas2\</Item>
		<Item>dlcpacks:\patchday2bng\</Item>
		<Item>dlcpacks:\patchday3ng\</Item>
		<Item>dlcpacks:\patchday4ng\</Item>
		<Item>dlcpacks:\mpluxe\</Item>
		<Item>dlcpacks:\patchday5ng\</Item>
		<Item>dlcpacks:\mpluxe2\</Item>
		<Item>dlcpacks:\patchday6ng\</Item>
		<Item>dlcpacks:\mpreplay\</Item>
		<Item>dlcpacks:\patchday7ng\</Item>
		<Item>dlcpacks:\mplowrider\</Item>
		<Item>dlcpacks:\mphalloween\</Item>
		<Item>dlcpacks:\patchday8ng\</Item>
		<Item>dlcpacks:\mpapartment\</Item>
		<item>dlcpacks:\mpxmas_604490\</item>
		<Item>dlcpacks:\mplowrider2\</Item>
		<Item>dlcpacks:\mpjanuary2016\</Item>
		<Item>dlcpacks:\mpvalentines2\</Item>
		<Item>dlcpacks:\patchday9ng\</Item>
		<Item>dlcpacks:\mpexecutive\</Item>
		<Item>dlcpacks:\patchday10ng\</Item>
		<Item>dlcpacks:\mpstunt\</Item>
		<Item>dlcpacks:\patchday11ng\</Item>
		<Item>dlcpacks:\mpbiker\</Item>
		<Item>dlcpacks:\patchday12ng\</Item>
		<Item>dlcpacks:\spikedclub\</Item>    
	</Paths>	
</SMandatoryPacksData>
 






So once you're done editting your dlclists.xml drag and drop it back into: Gta5/mods/update/update.rpf/common/DATA<-- 
You're all set if you followed these steps! have fun!


To spawn the weapon ingame you need to have simple native trainer: https://www.gta5-mods.com/scripts/simple-trainer-for-gtav
And then go to the weapons menu and find where it says spawn model by name and then open that and type in
WEAPON_SPIKEDCLUB then hit enter and walla you have your spiked club ingame ready to bash some skulls!