You can generally find Slovenian tracks for all eight seasons on these primary sites:
If your video file is named Entourage.S01E01.720p.BluRay.x264-REWARD , look for a subtitle file with the exact same tag ("REWARD").
This is the most comprehensive database for the Balkan region. Search for "Entourage" or its localized title "Priskledniki".
Most subtitles come in .srt format. For them to work automatically in players like VLC or MPC-HC, ensure the subtitle file has the exact same name as the video file (e.g., Entourage_S01E01.mp4 and Entourage_S01E01.srt ).