I am trying to get Simple SEO to work on an IIS 7 server that has the Helicontech ISAPI_Rewrite v3 software installed. This offers .htaccess support. However although SSU installed without errors and appears in the Zen admin, it isnt rewriting the product /category links.

In the support documentation for Helicontech it says the "[E=var:val] set environment variable" has no relevance in a Windows environment. So, I'm wondering if there is a workaround for this, or should I look at another rewrite system? Has anyone had a success with any of the rewriters in a Windows environment? (I'd switch to linux but I have other sites on the same package using IIS)