Use Scott Zanelli's ready-made MultiPageImporter: http://indesignsecrets.com/zanelli-releases-multipageimporter-for-importing-both-pdf-and-i ndd-files.php
-- the term " continuous flow" is not entirely appropriate for placing PDFs, by the way.
>What are the key commands?
To roll your own script all you need is a handful of Place commands, feeding the import preferences wih each page numer from the imported PDF. A good exercise to try yourself.