1. Method for executing in a player device a software application relating to an audio-visual presentation, wherein the audio-visual presentation is one of a plurality of titles stored on a first storage medium, the method comprising detecting a title selection request, and in response to the title selection request generating or updating a virtual file system according to the selected title; reading, within the virtual file system, data from the first storage medium, the data comprising audio-visual presentation data and software application data, the software application data having a language label associated; comparing the language label associated to the read software application data with a preferred language identifier; selecting, within said virtual file system, software application data that are associated with a language label matching the preferred language identifier; caching the selected software application data that are associated with a language label matching the preferred language identifier in a cache memory within the player device; generating a first audio-visual presentation based on said audio-visual presentation data, wherein the first audio-visual presentation starts automatically; during the first audio-visual presentation performing at least one of processing, decompressing, unpacking and compiling the cached software application data and upon termination of said at least one of processing, decompressing, unpacking and compiling the cached software application data, performing terminating said first audio-visual presentation; generating a second audio-visual presentation from said audio-visual presentation data readable from the first storage medium; and executing a software application based on the cached data while generating said second audio-visual presentation, wherein the software application is distinct from the audio-visual presentation and the software application modifies the audio-visual presentation.