<rewrite>
            <rules>
                <rule name="Imported Rule 1" stopProcessing="true">
                    <match url="^_images/([0-9a-f]{2})([0-9a-f]{30}).*$" ignoreCase="false" />
                    <action type="Rewrite" url="images/{R:1}/{R:1}{R:2}" />
                </rule>
                <rule name="Imported Rule 2" stopProcessing="true">
                    <match url="^_thumbs/([0-9a-f]{2})([0-9a-f]{30}).*$" ignoreCase="false" />
                    <action type="Rewrite" url="thumbs/{R:1}/{R:1}{R:2}" />
                </rule>
                <rule name="Imported Rule 3" stopProcessing="true">
                    <match url="^(.*)$" ignoreCase="false" />
                    <conditions logicalGrouping="MatchAll">
                        <add input="{REQUEST_FILENAME}" matchType="IsFile" ignoreCase="false" negate="true" />
                    </conditions>
                    <action type="Rewrite" url="index.php?q={R:1}&amp;{QUERY_STRING}" appendQueryString="false" />
                </rule>
            </rules>
        </rewrite>