I've finally finished the new version of this tool. It's pretty much a complete re-write although it looks much the same.
A few things:
1. I've called it version 1.0.0, but until I've had some bug reports back, best to treat it as beta code. (It works for me, but having overhauled it, there are bound to be a few minor snagettes!)
2. Please keep it within the technical community for now for two reasons:
- I haven't written the help, so I'm assuming you know what you're doing!
- For reason 1. I don't want to make it more widely available to non-technical people until the bugs (if there are any

) have been squashed.
Do PM me with your thoughts.
I have updated the original post with the URL.