As a matter of principle, I recommend using something
Maven or Ant to do this kind of work. Modern-day IDEs are wonderful things, but long experience has taught me that projects that cannot be built from a command line will deliver major pain and suffering sooner or later.
On the other hand, I don't mind supplementing
IDE functions for convenience' sake, only that it be possible to build the project on a system without an IDE as well. In Eclipse, probably the best aproach is to define an external tool using your system's copy command and bind that tool to your Eclipse project.
I'm speaking theoretically here, since I've never actually done this - I just use Maven or Ant.
The secret of how to be miserable is to constantly expect things are going to happen the way that they are "supposed" to happen.
You can have faith, which carries the understanding that you may be disappointed. Then there's being a willfully-blind idiot, which virtually guarantees it.