Mounting RAID on /Users

Question

My Mac had one 640 GB drive and everything resided there.
I've added three drives in a RAID 5 configuration.
How would I go about mounting the RAID at /Users instead of /Volumes.
For now, I've transfered the contents of /Users to the RAID and replaced the /Users directory with a symbolic link to /Volumes/RAID5.
That seems to work too although I still have the RAID showing up on the desktop.
Does either method have drawbacks?
Any suggestions or opinions are appreciated.
BTW... When transferring /Users/* to the new array, I used
"tar cf - /Users/(username) | (cd /Volumes/RAID5 && tar xbf -)"
That worked for the smaller directories, but would consistently crash the system on a big (~400 GB) user.
I had to do that account in smaller chunks.
Seems like I hit some sort of limit whether it be size or directory "depth".
Whatever the reason, it shouldn't drop the dreaded gray curtain on my screen.

Answer 1

Thanks so much, Camelot!
It didn't work at first, but it helped guide me to Google the right info.
I filled in the blanks with info I found here:
http://www.macosxhints.com/article.php?story=20080531040605723
In case others should come across this posting, here's what I did:
disktuil info /Volumes/RAID5
(to get the UUID)
vifs
then append:
UUID=63E14BC4-25D1-3140-B146-64B4CC4E7C28 /Users hfs rw 1 0
(Note: The lines ends with "hfs rw 1 0" instead of "hfs,rw")
vi /Library/Preferences/SystemConfiguration/autodiskmount.plist
(this was a new file)
and include the following:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>AutomountDisksWithoutUserLogin</key>
<true/>
</dict>
</plist>
If autodiskmount.plist already has some settings, make certain the AutomountDisksWithoutUserLogin key is <true/>
In my particular case, I had to rm my /Users symbolic link and mkdir /Users again.
Finally, restart.
Thanks again!