Systems and methods for providing a user-definable multimedia or digital library are disclosed. Also disclosed are systems and methods for selecting and playing multimedia or digital files from within the library. The selection and playback systems and methods involve a limited number of user activated buttons, which are implemented both for mapping directly to storage locations of particular multimedia or digital files, and for accepting and playing a multimedia or digital file once selected. The limited number of buttons required for the various features of these systems and methods provide vehicle operators, such as automobile drivers, with a safe mechanism and procedure for retrieving and playing customized play lists and particular songs while driving.