Open Inspect Element go to the "Network" tab. With this open click on the newspaper icon in the top left. That'll have the SWFs associated with the paper show up. This can be done with other things to.
JPEXS is something you'll need if you want to change the penguin color. Kurst is the software used to render the image of the penguin. See the "paper" loader section of the video sent by Rock. You find the SWFs of the items you wear and name them item0, item1, item2 etc. Arrange them in order of appearance otherwise you'll encounter issues with items overlapping. I'll try to explain it better later as I'm short on time. If you happen to be in the discord then that's also a good place if you want to talk.