RI server..

Hello,
I have completed SCWCD with 81% score.
Now starting with SCBCD.Have Head First EJB.
I was trying to start the tutorial given in the book, but have problems with the versions given for J2SE and J2EE.

It says to get J2SE v1.3 or 1.4...I have got J2SE v1.4
Now comes J2EE.It says for v1.3 also it says the version J2EE 1.3 comes with the entire API and a practice Referance Implementation Server(RI)..

I downloaded J2EE SDK 1.3.1 , BUT COULD NOT find anything what the book says.
where is RI , where is jar file??
please help me . I cant go ahead because of this problem.

Thanks ,
Mallika