Chrooting a user?

[Sunny Dubey <dubeys@voyager.bxscience.edu>]

hey

How would i Chroot a user?  I want him to be able to log into the machine 
like any other user, however his home directory would be his root directory, 
and he could do whatever he wants below it.  Something like this ..

(must have fixed-width font)
/home/user  -->  /  <Virtual-Root>
                 |
                 |->/bin
                 |->/usr
                 |->/var

and so forth.

Any ideas or pointers would be really appreciated, thanks.

Sunny Dubey