OK chaps, I've managed to crack this one now. I used a copy of Macrium Reflect and did a 'clone' of the disk and it seems to have worked OK.
I use Macrium Reflect to do all my backups but hadn't realised that it would do what I wanted it to do, that is to give me an absolutely identical image of the drive with my data on it. I know, you're all thinking 'what's he like eh!' well, it's definitely an age thing, I swear