请问怎样用subtitile的file (sub) ??

alantct

i hv a movie file, Lelio.Po.Po.2010.DVDRip.XviD.ONiE and another two files (seprate) is the sub  & idx file. may i know how to use or combine the video file so that i can watch it with subtitle ?  # j9 _- W0 D# ~7 I  n  g5 r

* e" r0 N$ P! M: [6 k1 _tvb now,tvbnow,bttvbthanks in advance.