> Could anybody send me an example, can be a very simple one, about
> creating a Connection Pool with Jaybird?

See http://jaybirdwiki.firebirdsql.org/config/Configuration

> Still, what .jar file should I put in my package of my application?

firebirdsql.jar + firebirdsql-pool.jar + mini-j2ee.jar + mini-
concurrency.jar or simply firebirdsql-full.jar

Roman