Using NTlite to slipstream programs in a Windows ISO

I started by posting this question on how to create a Windows 10 installation DVD, with preinstalled software (office, antivirus, etc), and it was suggested to try NTlite. After a test, the windows installed (as a virtual machine) with the customized ISO, doesnt have the software I tried to have preinstalled. The windows custom configurations and updates, worked fine, but the software pre-installation is also very important.

I'll retrace here my steps and maybe someone can spot a mistake.

This is the source loading into NTlite :

This is the updates :

This is some of the windows configuration (adding user accounts etc) :

This is a few software I added for a test :

And the final configuration :

As I said, the resulting windows installation doesnt have the software I tried to have installed.

Ideally, one should be able to create an installation image based on a windows (vm maybe) where the software has already been installed, but I guess that doesnt exist.