I would do it like this. (Disconnect your second drive, or umount it ) Make a dir:
/home/e-smith/files/ibays/data/homedirs on your first drive.
(connect/mount your second drive)
mount your second drive as: /dev/hdx /home/e-smith/files/ibays/data/homedirs
(and put that in your /etc/fstab after it works!, look at the other entries in fstab to see what the proper format is)
If you already have stuff on the second drive, then that will now be visible in
/home/e-smith/files/ibays/data/homedirs/home/e-smith/files/ibays/data/homedirs/user-name/
(I would simlpe remove everything form the second drive..)
Now you can make directories /user_name/ and they will all be on the second drive.
If you want to copy existing data, ( man cp will tell you all the secret options)
I would use 'mc' or by hand 'cp -pr ...' (preserve file attributes,recursive)
This makes a much cleaner installation, and the beaty is, that you can throw away your primary disk, build a brand new system, stick this drive back, and all your data is there!.
good luck.