Assuming you're a member of the organization and therefore licensed to use the content (but merely unable to access it): Purely hypothetically speaking, if an admin is this mia and obviously not on top of the job, the odds are probably high that they've neglected maintenance. Old PHP server running out-of-date PHP applications... not the most secure combo in the world. I wouldn't be surprised if there were some magic strings you could send to the server to get it to regurgitate the contents of the database in a more developer-friendly, strongly-typed fashion which you could import to myBB or XenForo and continue chugging along..