Download the latest copy of redCOMPETITION from the Downloads section of the redCOMPONENT site.
Once you have the appropriate version, install the component as you would any other Joomla! extension; visit the Install/Uninstall page in 1.5 or the Extension Manager in 2.5, select the package using the "Browse" button, and click on Upload. A notification will appear to indicate that redCOMPETITION and the redCOMPETITION content plug-in have been installed successfully.
redCOMPETITION relies on the redFORM component to display competitions, and as such it must be installed.
If the competition does not appear on the front-end, and you are sure that it is running and is published, check to make sure that the redFORM content plug-in is installed and enabled. redCOMPETITION uses this plug-in to display its contests.