Hi first of all

if you mean you have not subtiltile of the movie [kind of divx(xvid)], you should go to sites like :
Code:
www.opensubtitles.org
or
Code:
www.subtitlesbox.com
or
Code:
www.moviesubtitles.net
or
and download your disired little size movie subtitle.The best player
to play movies with subtitle is Kmplayer(&also the stongest player in the world),If you haven't I strogly recommend you to download or buy it.
If you mean you have a DVD with subtitle but you don't know how to use it,I'll tel you the sample process for 2 programs:
1-powerDVD :just play movie(open dvd) ,then right-click on the powerDVD screen,move arrow to select subtitle ,and you've done it.
2-KMplayer:open dvd folder,right-click on the Kmplayer screen ,move arrow to subtitle the select load subtiltle and address the location of subtitle file.(especially for .Avi movies)
Also if you mean how you can save the subtitle of one movie ,again I suggest using Kmplayer ,go to subtitle then merge/save as ,you know the rest.
If you have any problem yet I'm ready to give a soloution Weather I know that.
You can Also mailme:amir_bahalgharn@yahoo.com