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 ?  5.39.217.76& W7 a1 O8 o: n

. G$ \& [- X9 E$ G+ c, D! Ltvb now,tvbnow,bttvbthanks in advance.