You must have installed the Node5 Architecture as well as Scramble GT in that order. These will have been provided by BTI in the form of a transport request file. The only mandatory requirement is to then have the license key installed for the given SAP system. This will be provided by BTI as well.
Further setup will be conducted as part of the installation. This will involve the translation of your data manipulation, security and masking requirements into a configuration which can be executed in the same way each time.