.idx + .sub files = vobsub subtitles
you need DirectVobSub (now called VSFilter) to read them
download it
here (sourceforge.net)
copy VSFilter.dll to your
c:\windows\system32\ directory
go to start-->run
type
Code:
regsvr32 VDFilter.dll
vobsub subtitles may be supported directly by bsplayer in a
future release.