Adding subtitle to a DVD that does not have one

I need to add subtitles to a bunch of DVDs that does not have any. I’ve got the subs ready, but I cannot get the time code for each line. Help is desperately needed for that matter. Thanks.
Answer #1
Heres a google link http://club.myce.com/f62/how-add-subtitles-dvd-croatian-english-tutorial-135193/
Answer #2
Search for subs :-
http://subscene.com/
burn it in with the best software (convertxtodvd)
Answer #3
If you have the subs how come you don’t have the timelines???
Answer #4
Google is your friend.
I don’t mean to be rude but how hard is it to type in google “subtitles”.
This is a good one as mentioned by “Lord Detheroc”
http://subscene.com/