I would recommend against using this:
sudo sh -c "echo UUID=`diskutil info /Volumes/WD\ SmartWare/ | grep 'UUID' | awk '{print $NF}'` none hfs rw,noauto 0 0 >> /etc/fstab"
Running OS 10.6.2 and using a 1 TB MyBook Studio, this -did- stop that *#$%ing smartware partition from mounting, but it also caused every application that interacts with the drive (Disk Utility, Finder, etc.) to hang or refuse to launch 10-20 minutes after the drive has been mounted, ultimately necessitating a reboot. Not good.