a1: Not 100% sure waht you are looing for. Try adding "/qb" and see if
that is what you meant :-)
a2: That exact commandline may not be supported. But we intend to
support commandline-driven silent installs, yes.
a3: See the installer FAQ on http://pginstaller.projects.postgresql.org.
a4: Yes
Title: Message
Fundamentally if the user wants to run my software then I want to
get it running on their hardware. If after they have tried it ( and hopefully
liked it) they want to use it as a business tool then I am in a position to
HIGHLY recommend the necessary upgrades to hardware/OS et