How do I pick the new package ID-song?

[Morrows]

Watched this video: 

 

And at the end he says I need to first change the DLC-name that I have, and THEN I need to unpack it or something...I need to select some shit. Except none of the buttons he's talking about are there from the newer updates. I'm talking about 6:40 in the video. How do I do it? Can't find any buttons and I've been reading this forum and found like 6 different ways that I'm supposed to install the DLCs with. Very confusing for me

[Morrows]

Soooo apparently I had to press close. I'm tired. Goodnight.