1. Support and Documentation
(About Joomla!/The Project)

... Official Documentation Wiki. You can find information for beginners, installation, upgrade, Frequently Asked Questions, developer topics, and a lot more. The Documentation Team helps oversee the wiki but ...

2. How do I upgrade to Joomla! 1.5 ?
(FAQs/Current Users)

Joomla! 1.5 does not provide an upgrade path from earlier versions. Converting an older site to a Joomla! 1.5 site requires creation of a new empty site using Joomla! 1.5 and then populating the new site ...