extract subs from dvd and add them to another dvd

[alex5523]

i downloaded a dvd with spanish subtitles and what i want to do is extract them and then use them on another dvd (this dvd is the same movie but it has a better image quality)it doesnt matter if they are permanent.How can i do that i am reading your tutorials but icant understand them that well.Any help?
as is from the internet i have them extracted as .ifo and .vob

[manono]

Hi-

Demux the Spanish subtitles in SUP format using PGCDemux. Take the other DVD and demux everything (video, audio, subs (if any), and celltimes.txt (chapters). Remux using Muxman, this time adding the new subs or replacing one of them with your Spanish language SUP file (replacing will be better and easier, if possible). After authoring, open the DVD (the one with better image quality) in VobBlanker and use the "Replace" button to replace the original movie with the one you made with your new subs. Process and Test. If the subs don't show up, come back and ask again.