Please, import .mbox archives into Launchpad Mailing Lists

I am currently running five Mailing Lists, and I would like to use new Launchpad Mailing Lists to substitute them. Anyway, I would like to maintain the archives for these Mailing Lists, too, importing ML archives into LP.
I have the .mbox files of my Mailing Lists, but I am unsure that such operation is technically possibile. I asked on #launchpad about that, and I have been granted that this could be easily done.

The import scheme is:

http://www.beeseek.org/lists-backup/beeseek-artists-beeseek.org.mbox --> https://launchpad.net/~beeseek-artists
http://www.beeseek.org/lists-backup/beeseek-bloggers-beeseek.org.mbox --> https://launchpad.net/~beeseek-bloggers
http://www.beeseek.org/lists-backup/beeseek-devs-beeseek.org.mbox --> https://launchpad.net/~beeseek-devs
http://www.beeseek.org/lists-backup/beeseek-promo-beeseek.org.mbox --> https://launchpad.net/~beeseek-promo
http://www.beeseek.org/lists-backup/beeseek-wiki-beeseek.org.mbox --> https://launchpad.net/~beeseek-wiki

Thank you in advance.