Hi r.kukrja,
Since you have a WLC, you need only perform configuration on that. The access points take their configuration from the WLC.
Here's a link to some configuration guides for WLCs. Choose the one for your software version. If you're unsure of which version you're running, you can learn this by opening your web GUI for the WLC. It shows the version number on the main Monitor tab window.
http://www.cisco.com/en/US/products/ps6366/products_installation_and_configuration_guides_list.html
Let us know if you have any specific questions for how to configure the WLC. Someone here should be able to assist if you do.
Jeff