Adding Sub's

Okay, I usually use Xilosoft to convert the avi to an iso for my back up's of the movies and so they can play on any stand alone dvd player. I'll let my girlfriend borrow the back ups and now she's wanting me to add the subs.

Input please,

 

http://forum.videohelp.com/threads/277950-How-to-add-new-subtitles-to-an-existing-DVD

 

Do you want to add subs to the DVDs already converted, or the DVDs that you will be converting in the future?

 

I'm wanting to add the subs before i convert them over to play on stand alone dvd players.

 

We go back to free DVD Flick,The FilmMachine, or pay for ConvertxtoDVD,all the good converters that support subtitles.