you can follow the steps to deploy showcase from eclipse, which is here:
Particularly the 3. Setting up Eclipse to work with the showcase part.
Then it depends on what application you are going to deploy. I would strongly recommend you to start with RichFaces simple app archetype. Follow this tutorial if you want it:
On that link you can also find more information about Eclipse integration.
If you you have other questions just ask.
Thanks for your input Juraj .