Following on from the EP35 region free mod, those clever guys have worked out a way of making the EP30 region free for DVD also (remember that HD DVD was always region free, this is for DVD playback only).
It’s a lot more complex than the EP35 mod unfortunately and a “dirty hack” as they put it. Be warned, you could brick your player, so only proceed if you feel happy with a dirty hack and the risks involved. Hopefully an easier mod will pop up later.
Details here: http://www.avforums.com/forums/hd-dvd-players/861280-ep30-region-free-firmware.html