The dogbone mount is replaced simply by unbolting it and bolting in the
new one.  You don't need to jack the engine up.  Pay attention to the
offset of it's strut so that the new one goes in with the same offset.
If you are unsure, try laying the new part in both ways; one way the
mount will look slightly twisted in it's brackets, the other way it
will look straight.  It is a subtle difference.  I have seen cars come
in that had this put on backwards, though I would think it would be
fairly obvious if you pay attention during installation.

This dogbone mount can simply tear from normal engine rocking motion,
but it will wear very quickly if your front engine mount is worn.  The
front mounts on 92-96 Camrys are really bad for breaking, too.  It
would be wise for you to replace it as well, but it is more difficult.
You must jack up the engine during the process.  There are three 10mm
bolts on the bottom flange and one 12mm nut on the top stud that
require removal, then the engine has to be lifted enough to provide
clearance for mount removal.

Toyota MDT in MO