Hi,
Concerning the Java steps, sometimes you no longer need them since you can find some Java methods in the 'SET' step under 'Java'. But if you need other Java methods, you can copy them from a script done under the version 3 of IPCC Express, since it's supported.
I heard we can also include the deprecated steps in the version 4 by adding them to an xml configuration file, I didn't try it and I'm not sure about that.