Migrating from 1.0.x to 1.5 Stable
From Joomla! Documentation
Step One: A newer version of migrator available. Article says RC6, but 1.0 Stable available http://joomlacode.org/gf/download/frsrelease/7279/24909/migrator.zip
ot2sen
Suggest an addition to the documentation that if a third party plugin does not show up in the list after uploading, check the permissions on /administrator/components/com_migrator/plugins/ (should be 777) at the same time, check the dumps directory for the same permissions.
john abbott