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Not him but it would work with multiple images like that, then all you do is open up ms paint in 2 separate windows, one will have the collage and the other will be for opening the screenshots to copy and past them into the collage. You'll have to use the selection tool and then drag and select what you want to copy, then ctrl + c, then on the collage window ctrl + v. After that go back to the screenshot window and open a new screenshot. Alternatively you can use a collage maker online or another image editing software. This method is how most image based 4chan thread archival is done like pick related