TechARP shows us how to create a profile for your Radeon HD 48xx with ATI Catalyst Control Center and how to edit it manually (the profile is saved as a XML file).

In Windows Vista, the profile is placed in “C:\Users\Your Windows ID\AppData\Local\ATI\ACE\Profiles\”

In Windows XP, you will find the XML profile file in “C:\Documents and Settings\Your Windows ID\Local Settings\Application Data\ATI\ACE\Profiles\”.