the version 3 documentation is still valid with version 5, all of the steps are still the same.
The only change is that Database Search is not a part of DataAssist. So you need to use the DataAssist Search server behavior from data assist.
other then that the concept and steps are the same, the interfaces may loo slightly different, but they still do the same job.
If there is a specific step in the documentation you are unsure of, let us know.