If anyone is thinking of doing this, be careful. There appears to be some confusion, with people claiming that the US version (at least) of this player does not have an extractable microdrive in.

http://www.fatwallet.com/forums/messageview.php?catid=18&threadid=265023

My best guess is that the early production of the unit used complete extractable microdrives until Hitachi started supplying them with bastardized microdrives.

No surprise I guess, Hitachi want to keep selling their microdrives to us mugs at twice the price.