If anyone is interested in testing joomla on IIS I have just got it up and running really easily.

This article gets it running on your windows box (I am testing on W7)

Installing on Microsoft - Joomla! Documentation

This article gets PHPMYADMIN working

Install and configure phpMyAdmin on IIS | IIS Aid

I had an error in the config file so couldn't get it working at first but now its up and running.

It installed to my MY WEBSITE folder but its just for testing at present, going to try and export my other Joomla install onto it now.

Hope this helps someone.

PS.. the only reason I am messing with this is to test UAG with Joomla inside my network... it words with IIS on a standard site so wanted to see if it was a joomla issue or WAMP stopping it.