Easier way.
1. Add the new disk, partition it however you want. 2 partitions, one for
/home, one for /tmp. Make the filesystems.
2. As root, cp -Rp things over. Best to have as little activity as
possible. That is, not running X, not getting e-mail.
All that is really needed is runlevel 1, or boot single; no need for rescue
CD, no need to worry about activity, etc.
Also, I'd probably do a
cd /home; tar -cvf - | ( cd /mnt/home; tar -xvf - )
cd /tmp; tar -cvf - | ( cd /mnt/tmp; tar -xvf - )
assuming that the new partitions are mounted at the same time under /mnt.
--Marcin
