Well, it is possible, to a certain extend. First thing to do is mirror your site using httrack. This scrapes every public information visible for guests so you can sort of see your site on your local PC. Next you scrape that local mirror using a DOM sniffer I've seen around here some years ago. IIRC that was in the 3.0 days so that would probably need some updates.
You won't get everything, though; any hidden forums/topics/posts and all PMs will be lost. You will get forums, topics, posts, and users but you will loose passwords, polls, user settings, etc.
It's quite tedious, but AFAIK it's your only option if you want to leave Forumotion while keeping as much as possible from your board.
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