adding subtitles, rookie question

[Ngezi]

What's the easiest way to subtitles to playback?
I tried with virtual dub but that isn't what I'm looking for.
There should be a way to simply add them on the fly while watching ?

how?

[khp]

Vobsub

http://vobsub.edensrising.com/vobsub.php

Guide

http://www.doom9.org/dvobsub.htm