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 ?  5.39.217.77' {# N. J7 \* y. N" G4 Z  |
- q& Z" N. |8 I; _! b6 u( c
thanks in advance.