Inserting subtitles into existing DVD

[katana]

Hi,
I have a Thai language DVD with Thai audio and Thai subtitles, but no English subtitles present. I have some separate English subs in .srt format.
Is there any easy way to insert these second english subtitles to the already authored DVD?
Thanks in advance for any advice/info.

[NightTran]

if you just play them in computer then name the sub the same as the movie and put them in the same folder and play, if you want to make a back up with sub in it then use auto GK and make your movie to avi file, then use dvd flick and make a movie then insert the sub with it. Both of the program are free. But the sub have to be the same leghth with the movie I still dont know how to adjust when they are not the same

[blutach]

Convert them to SUP using Subtitle Creator then mux them in with Muxman (obviously, you'll need to demux the DVD first). Search this sub-forum for threads on this.

Here's a thread that might help you - http://forum.doom9.org/showthread.php?t=124949

Regards

[katana]

NightTran and blutach.
Many thanks for the suggestions and links. Will give it a go.