OK, well I'll have to watch the movie again but I can tell you a few more things. *warning I'm not stephen king so I may be wrong* But I think that the picture of Jack in the hotel in the 20s is symbolizing that the evil that consumed him had always been in there. And for the others I'll have to rewatch it to tell you.
btw I'm a huge S.K. Fanboy and that's why I can tell you so much because I read alot of his articles and forewords, afterword, afterthoughts etc.

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