CMS2CMS Migration Plugins: Why and How MediaWiki to WordPress Plugin | Page 4
How to Prepare for Migration?
1. Back up your MediaWiki website
2. Install WordPress
3. Set up custom URL structure for WP
4. Find FTP access details for WordPress.
Find more info in this article
http://wordpress.org/plugins/cms2cms-automated-mediawiki-to-wp-migration/