How to create another JC Denton clone

This guide explains how to exploit a funny bug and create 2 JC ragdolls.

Part 1: Upload the Specs

You can create 2 JC ragdolls in the end of the game. Firstly you'll have to be in the final mission, Liberty Island, and side with either Illuminati or ApostleCorp, but following the Omar ending. At one point you'll enter the ruins of the old UNATCO HQ, and in what used to be Alex Jacobson's room, upload the Aquinas specs to Illuminati or to JC.

Part 2: Killing the Opposition

Outside, Luminon Saman and his Templars will be waiting. Kill them. Travel to the Illuminati camp, and put an end to Chad Dumier and Nicolette DuClare as well. JC must be the final faction leader alive.

Part 3: Betraying Your Brothers

Make your way to JC's camp. Make a save. You cannot make and reload a newer save after this because JC's first ragdoll will disappear. Kill JC, and grab his corpse the moment he starts to teleport away. Drop it and you'll have the first JC ragdoll.
Destroy his machine. The reason we're doing this last is because JC's 2nd phase won't spawn unless all the other leaders are dead. And you cannot leave the map because that'll make the 1st JC disappear. After the 2nd JC appears, knock him out to not trigger the ending.

Part 4: Seeing Double

And now, you'll have 2 JC ragdolls you can play around with or take silly pictures with. Careful not to throw any objects to the 2nd JC as it'll kill him. If you wanna trigger the ending, kill the 2nd JC and the Omar will contact you.
Bonus pic: Denton family photo!