<RewriterRule>
<LookFor>~/fckeditor/(.*).html</LookFor>
<SendTo>~/fckeditor/$1.htm</SendTo>
</RewriterRule>
<RewriterRule>
<LookFor>(.*).html</LookFor>
<SendTo>$1.aspx</SendTo>
</RewriterRule>

<compilation debug="false">
<buildProviders>
<add extension=".htm" type="System.Web.Compilation.PageBuildProvider" />
</buildProviders>
</compilation>