How to Reinstall iChat

Insert the Mac OS X Install DVD into your disc drive.
Double-click 'Optional Installs.mpkg' to launch the optional components for the operating system.
Click the arrow next to 'Applications,' and select 'iChat' from the list.
Click 'OK' and then 'Install' to reinstall iChat to your Mac computer.
Eject the Mac OS X Install DVD once the package install is complete. You will now find iChat located in the 'Applications' folder.
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