This is what I remove. I don't recommend removing all of this stuff unless
you're sure you don't need it, but for what I do I remove all the
following and it shaves about 2.5 GB off the install.
/Applications (Erase all Except Casper Imaging, System Preferences,
Utilities)
/Applications/Utilities (Erase all except Activity Monitor, Console, Disk
Utility, System Profiler, Terminal)
/Library/Application Support
/Library/Desktop Pictures
/Library/Dictionaries
/Library/Documentation
/Library/Fonts
/Library/Image Capture
/Library/Internet Plugins
/Library/iTunes
/Library/Mail
/Library/Receipts
/Library/Scripts
/Library/Spotlight
/Library/Updates
/Library/User Pictures
/Library/WebServer
/Library/Widgets
/System/Library/Automator
/System/Library/CoreServices/DefaultDesktop.jpg
/System/Library/Image Capture
/System/Library/Input Methods
/System/Library/Podcast Producer
/System/Library/Printers
/System/Library/Screensavers
/System/Library/Screen Reader
/System/Library/Services
/System/Library/Sounds
/System/Library/Speech
/System/Library/Spotlight
/System/Library/User Template
