PrefSetter allows you to edit plist files (Property LISTE) files. It is designed for viewing and editing preference files on Mac OS X. It is very useful for setting "hidden" preferences that aren’t accessible directly in an app. Pref Setter, while the focus is on editing preferences is a general plist editor.
PrefSetter makes it easy to access your preferences with the "Open Domain Quickly” window. This window lists your preference files and those stored in the /Library/Preferences directory.
You can also search preferences with the Find panel. This will search all of your preference files for a term or individual plist files with the search bar.
Pref Setter offers extensive copy & paste / drag and drop support. To create or modify a value, you can drag and paste an XML string in property list format onto a document window. You can now paste / drag an "defaults write string into Pref Setter to have it create that value for you. You don't even need to go to the terminal!