hide all sections except some in silent mode

[jsbach]

i'm confused on how to hide all sections except one (i.e. instfiles) while in silent mode. i don't want to exclude pages or make everything silent: i basically wish a normal script to always show instfiles progress wheter or not /S par was passed on cmdline; if no /S is passed, then script should execute as normal (with all sections/pages).

I'm quite sure this possibly be already covered in the forum : my apologies not finding it. i appreciate just an hint to correctly look for the right anwser to my need...
thanks.