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 ?  + v" p/ N8 b; H% I/ I
公仔箱論壇5 U1 U/ G1 U- b
thanks in advance.