How can I backup and restore a course from a 1.9 site to a 2.0 site?
The backup and restore process has been completely rewritten for Moodle 2.0. It is not currently possible to backup a course on a 1.9 site and restore it to a 2.0 site, however the functionality should be available in Moodle 2.1 (see MDL-22414). In the meantime, a workaround is to upgrade a copy of the 1.9 site to 2.0.