The FG Joomla to WordPress plugin is now compatible with Joomla 1.0 and Mambo 4.5 and 4.6.
It converts the {mosimage}, the {mospagebreak} and it converts Joomla/Mambo static articles to WordPress pages. It also converts sections, categories, articles, images and users.
This feature is available in the Premium version: https://www.fredericgilles.net/fg-joomla-to-wordpress/
