[Plugin: WordPress Importer] Importing from local disk

Is there a way I can hook into the import/parser to import an XML file stored locally (to the WordPress install), rather than having to manually upload a remote file.

I would like to use this for:
1. Creating default sets of data via the admin screen.
2. Creating default sets of data on network site creation.

http://ww.wp.xz.cn/extend/plugins/wordpress-importer/