Permalinks on IIS 7.5

I’m trying to define the Permalinks for an old WordPress blog on IIS 7.5, but the rules in my web.config don’t seem to work properly. No matter where I looked online, I only found one chunk of code (which was weird, since it should technically be a little different, depending on how you have the permalinks configured):

<rewrite>
<rules>
<rule name=”Main Rule” stopProcessing=”true”>
<match url=”.*” />
<conditions logicalGrouping=”MatchAll”>
<add input=”{REQUEST_FILENAME}” matchType=”IsFile” negate=”true” />
<add input=”{REQUEST_FILENAME}” matchType=”IsDirectory” negate=”true” />
</conditions>
<action type=”Rewrite” url=”index.php/{R:0}” />
</rule>
</rules>
</rewrite>

My permalinks are defined using the custom structure:

/%category%/%postname%/

How do I turn this into a valid rewrite rule? My experience with IIS is almost non-existent, so any help is appreciated.

Thanks.