Orchid is a small framework with bare necessities to kick start developing killer php web applications. this framework is not flooded with unnecessary features and libraries. it only contains the essential helpers and libraries to boost up your development, not slowing it down. orchid features a very short learning curve, which will keep you trouble free.
He documents the step he followed - downloading the latest release (from the svn repository), making a first controller and adding a view to make his first "hello world" application.