At first: Sorry for my English. That's why I'll keep this very short.
First you need to install Debian:
http://mybookworld.wikidot.com/forum/t-304045/how-to:debian-on-mybook-white-light
I installed Squeeze.
Then you have to download a special version of Plex:
http://plexrpms.markwalker.dk/arm/plexmediaserver-0.9.7.22.511.tar.gz
Unpack it in /mnt /data/Plex/
Because it consumes a lot of memory.
You need to install with apt-get packages like pyhton, ffmpeg, locale.
Then simply run it with: cd /mnt/data/Plex/plexmediaserver/ && / mnt/data/Plex/plexmediaserver/start.sh
For an automatic startup I just added this line into /etc/rc-local :
start-stop-daemon —start —quiet —background -m —pidfile /var/run/Plex.pid —oknodo —exec /mnt/data/Plex/plexmediaserver/start.sh 2>/dev/null
When you run the automatic startup, first you must run this command:
ln -s /mnt/data/Plex/Library /Library
and to make it save
ln -s /mnt/data/Plex/Library /root/Library
Transcoding is not possible.
I use it with the Samsung Smart TV, and it works great!
Suggestions and questions are welcome.