1. A method of enhancing multimedia data contained on an information carrier, said information carrier also containing additional carrier data, said method comprising the following acts: reading a user file containing user data defining previous actions of a user, in a storage unit of a recording and/or reproducing device, providing, in an off-line session, the additional carrier data as a function of the user data, updating the user data to reflect a latest off-line action of the user, providing, in an on-line session, additional remote data from a remote unit as a function of the user data, the remote unit being connected to the recording and/or reproducing device via a network, and updating the user data to reflect a latest on-line action of the user so that a viewing experience of the user is consistent during both the off-line session and the on-line session and same customization features are provided when the additional carrier data are coming from the information carrier or when the additional remote data are coming from the remote unit.