[Grml] Installing grml with encrypted root with encrypted swap

Hi, I was wondering if it was possible to install grml on an encrypted root partition and with an encrypted swap partition. I plan on installing grml on an external USB drive and since it can be stolen so easily, I'd rather protect my data using encryption. So is this possible? According to htt://grml.org/grml2hd/grml2hd.html this can't be done but that web page hasn't been updated since Jan. 2006. Any ideas? Thanks for your help.