This plugin is an addon to GravityForms. You can find gravityforms here: http://www.gravityforms.com/
After activating the plugin, please go to Settings menu and click on CyberSource tab. Fill out all the configuration options. Few of them are explained below:
Default currency code to use with CyberSource Secure Acceptance. Must be one of the documented currency codes.
http://apps.cybersource.com/library/documentation/sbc/quickref/currencies.pdf
Access Key from the CyberSource Secure Acceptance Profile.
Endpoint for CyberSource Secure Acceptance Web/Mobile.
The locale code that sets the CyberSource Secure Acceptance Web/Mobile language to be used for the transaction.
CyberSource Secure Acceptance Web/Mobile profile ID to use.
Secret Key from the CyberSource Secure Acceptance Profile.
Default country to be prepopulated with the CyberSource Secure Acceptance Web/Mobile transaction. Must be a valid ISO country code.
http://apps.cybersource.com/library/documentation/sbc/quickref/countries_alpha_list.pdf
Default state to be prepopulated with the CyberSource Secure Acceptance Web/Mobile transaction. Must be a valid state or province code.
http://apps.cybersource.com/library/documentation/sbc/quickref/states_and_provinces.pdf