Just a little quick tip. When you install Umbraco v4.0.2.1 (don't know about other versions) without runway and you publish your site, you will see a blank screen. This is because the data/umbraco.config file contains the runway site as you can see in the sample xml below.
<!DOCTYPE umbraco[ <!ELEMENT nodes ANY> <!ELEMENT node ANY> <!ATTLIST node id ID #REQUIRED> ]>
<root id="-1">
<node id="1048" version="6f0d47e7-8cf1-43e5-a5ad-c687e0b78331" parentID="-1" level="1" writerID="0"
creatorID="0" nodeType="1045" template="1042" sortOrder="2"
createDate="2008-05-02T09:52:36" updateDate="2009-02-18T10:19:26" nodeName="Runway Homepage"
urlName="runway-homepage" writerName="Administrator"
creatorName="Administrator" nodeTypeAlias="RunwayHomepage" path="-1,1048">
<data alias="bodyText"><![CDATA[<p>Runway gives you a bare-bones website that introduces you to a set of
well-defined conventions for building an umbraco website.</p>
<p>The Runway website is very simple in form and provided without any design or functionality.
By installing Runway, you’
ll begin with a minimal site built on best practices. You’ll also enjoy the benefits of
speaking the same “language”
as the rest of the umbraco community by using common properties and naming conventions.</p>
<p>Now that you know what Runway is, it is time to get started using Runway.</p>]]></data>
<data alias="siteName">Runway</data>
<data alias="siteDescription"><![CDATA[Off to a great start]]></data>
..................... </node>
</root>
Work around for this issue is to republish the entire site first. I've added this issue to codeplex. Please vote here.