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 ?  公仔箱論壇4 `  U* v9 P# v) C, U( [* X

" e. J5 Z% C* o) P$ i5.39.217.76thanks in advance.