hide installer details

my installer consists of two pages, a custom with an io page and the InstFiles

i tried putting SetSilent silent at the end of the io page, then i put it at the beginning of my section. in both cases the InstFiles page shows up for a very short time (as there's not much to be done). why is it not hidden?

Can only be used in .onInit.

It shouldn't do anything when used anywhere else.

-Stu