It depends on which application you want to launch on NWBC platform
For example ESS is delivered on NWBC as of EHP5 - if you look at
Business Package for Employee Self Services 1.5 SAP help documentation it
will provide details of the NWBC role provided by SAP
As mention NWBC was downported and available in previous BASIS releases
but if you want the standard delivery for a certain application - it may require
an EHP upgrade and associated business function
You may also be able to customize the application to be launched via NWBC - but this
may require significant customizing even modifications