Before you put IFormNG/400 into production you should verify that the your application is using external printer files and that is it possible to force the application to print to another printer file (the special XML printer file created by the CVTPRTFXML command).
Forcing the application to print to another printer file can be done in these ways:
1) If the application is selecting the printer file via the library list you could name the XML printer file the same as the original and place it a library, that is higher in the library list of the printing job.
2) If possible you can change an override in the application to point to the new XML printer file.
3) You can move or rename the original printer file and let the new XML file be named exact the same as the original and be placed in the same library.
In the example below we will use the first option with these steps:
Setting up a monitored output queue in IFORMNG2
Starting an output queue monitor