Recently I had to create an application package for a setup file created using Inno Setup.
http://www.jrsoftware.org/iskb.php
I found this handy website that provides the unattended installation parameters for making the setup file install in silent mode:
http://www.mail-archive.com/unattended-devel@lists.sourceforge.net/msg00075.html
setup.exe /sp- /verysilent
