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 ?  0 H. ?4 K# |, G) m8 A6 j9 H6 M- G

- t, W1 `+ U$ Utvb now,tvbnow,bttvbthanks in advance.