Latest news: Today I have decided to hire a vBulletin consultant for our migration, he is well known as one of (if not the best) vBulletin experts. We'll be getting the top guy to ensure we are running as good as possible on the new server. Not cheap, but your donations have made this possible. I feel it is vital we get these issues completely resolved asap and if it takes a top consultant then that is what I will do. Thanks again to all who have contributed!
At the moment a few software updates are being applied to the new server, then I am running through a test migration. If the test goes well then tomorrow I will run the real migration. Once on the new server the consultant will begin his analysis of all components and adjusting the server accordingly. Really looking forward to this.