Nevermind, it's 2.4.someting

If you only have one website on the server you can just change ServerName to your FQDN and point the DocumentRoot to wherever you want. Just remember to change the existing <Directory path/to/someplace> also.
If you want to keep the existing site and add a new one you use VirtualHosts. The first virtualhost should be a minimal config of the main host (in httpd.conf). If the DocumentRoot in httpd.conf is say c:\Apache\htdocs the, first VirtualHost would be;
<VirtualHost *:80>
DocumentRoot c:/Apache/htdocs
</VirtualHost>
Then you start adding any other sites you want;
<VirtualHost *:80>
ServerName
www.example.comDocumentRoot c:/somewhere/else
<Directory c:/somewhere/else>
Options
whatever-options-you-wantAllowOverride
whatever-overrides-you-wantRequire all granted
</Directory>
</VirtualHost>