How to start

Hello, I have only recently started to be interested in neural networks and it is not clear to me how to replace the head using your code. Can you write in more detail in which folders to drop the files 073-00000000.pth, 417-00000000.pth, parsing.pth, vgg19-d01eb7cb.pth?
In which folders should there be a photo source and a photo from which the head is taken?