Hello Adrian! Sorry, but by your hint I just realized that things are not simple as I thought... I was thinking that it is possible to specify all what is needed in deployment descriptors (ejb-jar.xml and ejb-inprise.xml). I DIDN'T KNOW AT ALL about existence of that administrator web view of JBoss, and probably I have to study it first. Is there any free tutorial about using it, and configuring JBOSS? If there is some shorter way to make JBOSS use some other DB than hypersonic (for example Oracle 8.1.6) could you explain it? I didn't understand you question about JNDI names. I just reference ejb-s by simply name, like:
...
Context ctx = new InitialContext();
Object ref = ctx.lookup("Bean1");
Bean1Home = (Bean1Home) PortableRemoteObject.narrow(ref, Bean1Home.class);
...

and it works for B.A.S. 4.5.1 as I said before.

Related part of ejb-jar.xml is:

...

<ejb-name>Bean1</ejb-name>
ejbmodul.Bean1Home
ejbmodul.Bean1
<ejb-class>ejbmodul.Bean1Bean</ejb-class>
<persistence-type>Container</persistence-type>
<prim-key-class>java.lang.Integer</prim-key-class>
False
<cmp-field>
<field-name>id</field-name>
</cmp-field>
<cmp-field>
<field-name>name</field-name>
</cmp-field>
...
<primkey-field>id</primkey-field>
<resource-ref>
<res-ref-name>jdbc/DataSource</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>



Related part of ejb-inprise.xml is:
...
<inprise-specific>
<enterprise-beans>
...

<ejb-name>Bean1</ejb-name>
<bean-home-name>Bean1</bean-home-name>
<resource-ref>
<res-ref-name>jdbc/DataSource</res-ref-name>
<jndi-name>DataSource</jndi-name>
</resource-ref>
<cmp-info>
<database-map>
BEAN1
</database-map>

<method-signature>findAll()</method-signature>
<where-clause />
<load-state>True</load-state>

</cmp-info>

...
</enterprise-beans>
<datasource-definitions>

<jndi-name>DataSource</jndi-name>
jdbc:oracle:thin:@_url:_port:_SIDname
_user
_password
<isolation-level>TRANSACTION_SERIALIZABLE</isolation-level>
<driver-class-name>oracle.jdbc.driver.OracleDriver</driver-class-name>

</datasource-definitions>
</inprise-specific>

Is that inprise-specific tag means that ejb-inprise.xml is specific for Borland Application server? What should be JBoss substitution for that?

regards,
Vlada