divx problem

i download a big movies file with 5 videos each 700mb and come with idx,sub,srt file i dunno what they are first it won't play da sound but i got a special audio from da net and it play but winavi converter can't read da file i want to combine all those video together to burn on a dvd with da subtitle how do i do that i try to join them together but not a software wouldn't read besided window play and dix player that da file name Titanic.1997.SE.XviD.DTS.CD1-WAF

 

still jive talkin...