do as i am waiting to do, wait till the > 10GBGB microdrives come out, repartion and copy fies accross
one thing you might want to note, CF microdrives are only 1" accross so ther is not enogh room, and that hard drive uses IDE not CF, CF has an IDE emulation mode but its not pin for pin, you need an adaptor and its only in use if you plug a CF card into the ide bus, not if you plug an ide hard drive intothe CF bus
there should be 20GB microdrives out next year acording to rumours, or you could use the same chips as are in the nano and get 4GB of flash by resoldering the flash chips in your PDA turns out they are pin compatible and sumsang ships product samples.