So the TID I found for NMAS silent installs is when Novell used
InstallShield.

But in NMAS 3.0 they use InstallAnywhere by ZeroG

The problem is that the 4.91 client was installed WITHOUT NMAS and now I
need to put NMAS on the workstations by using the nmasclient_seutp.exe but I
need it "silent" or at least so the user doesn't have to click "English" and
"Go".

Is there a way to do this?