[otrs] migration to new OS version

Hello, We are migrating from Cent OS 5.7 to Cent OS 6.2. I want to create a clean otrs install and tailor it like we currently have. This brings about a few challenges, mostly, finding out all the parameters that have been changed over the years from the default. Does anyone know a simple way of checking fro all non-default parameters that are NOT hard-coded in any of the config files (as there are a few of those too). thanks Neil