Many times we need to add extra fields or functionality to our Joomla core com_component. That's the moment to install a CCK extension, we would need to install an extra component to give to Joomla extra power.
You can help us with a donation. All the donations received will be spent on open source development. The price of a cup of coffe is all we need. If our GNU extensions are useful to you, please take a minute to keep the project alive.