You can import your already existing QoS Profiles in DDS XML format created with e.g. RTI System Designer, as shown in figure below.
To import QoS Profile
If you modify the original QoS definition file, you can reimport it. Note, that the existing QoS Profiles will be replaced, so you will have to restore their assignments manually.
To reimport QoS
Right-click the imported UserQosRepository element and from the shortcut menu, select the Reimport QoS Profile.