For more information about how to perform various administration and customization tasks, you can see Liferay's documentation.
Specifically, the Liferay Portal Administrator's Guide provides extensive information about installing, configuring, and maintaining a portal.
You can download the guide from the Documentation section of the Liferay web site (www.liferay.com). It is also packaged with the Latitude 2.2 documentation on EDeN.
Liferay also offers developer assistance in the form of blogs, wikis, and forums. These resources are available from the Community section of the Liferay web site.