The easiest way to use this mod is to follow the instructions below:
Enable the cheats console and activate the 'bb.showhiddenobjects' cheat
Filter your objects by the 'Jungle Adventure' pack
Scroll down and find the clumps of rock that have the name of the artifact in it's title (i.e. Counterfeit Harvest Knife)
Place the object and go to Live mode
Once you're in live mode you can shift-click on the clump and choose the 'Set Artifact State...' option to change the Quality, Authentication State, and Rarity.
Also, there's a bit of a lag after you change the quality. It will fix itself if you leave the lot and come back or you can see that it's changed because the price changes. If you start with a dirt clump, choose the quality, and then choose the authentication that matches that quality then you will see the quality change immediately.