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F1 2019 How to upload an helmet ( made on photoshop ) in the F1 2019 game?

F1 2019 The Game (Codemasters)
Hi all,
I have made my personal helmet on photoshop and I would like to add it in the f1 2019 game but I don't know what format I need to use and where do I have to paste the files I will create. Anyway, can somebody help me on this?