XF 1.2 phpBB 3.0.11 Redirection Script for IIS 7.0?

Hi guys,

I'm from http://www.diabetes.co.uk/diabetes-forum/ and we've just bought a Xenforo license and are in the process of planning out our switch from phpBB 3.0.11 to XF 1.2

We need a little help though - our forum is the most important part of our site and currently we perform reasonably well in terms of SEO. I'm not especially technical with this kind of thing myself but I'm wondering if someone can give me a little help in sorting out a URL redirect. The only ones I've managed to find are for Apache rather than IIS and our web guy isn't yet confident with switching over to Apache so we're going to stick with IIS for the time being.

Any help and guidance you can throw at me will be much appreciated. Thanks!