QUOTE:
i create with export content component an archive import_content_data, and i don't know what to do with this archive.
i have on my 2 sites installed export content but i don't know how to import the archive on my new site.
Make sure you have correct version of Export Content installed on both sites then just install the import_content_data as you would any other component.
You will then find that the transfer items (transfer by section etc) will be populated with the imported data.
