You add the .idx file as the subtitle file. The .idx file itself points to the associated .sub file, so you don't have to tell ffmpegX about the .sub file. Note: this only works for encodings with the 'DVD mpeg2enc' preset and 'Decode with mplayer' activated.
Tonight is the night- Game of Thrones, season 6, premieres on HBO. The show begins at 8 p.m. CST, and will last for one hour.
Game of Thrones on HBO is a TV adaption of George R.R. Martin's books, a Song of Ice and Fire. For those fans who know and love the books, then you can't help but love the TV adaptation. It is difficult to translate books into movies or TV series, but HBO's GoT made it look easy.