I have a dvd backup ripped with dvd decryptor, I have all the files using dvd decryptors file rip. Now, I would like to add subtitles to this dvd backup in russian language which I have downloaded from an internet website. Also i have an mp3 translation for this movie (48Mg) In russian language which I also got from the internet. How can I add these files to the dvdr backup? Is there a guide or something?

Thank you very much for your help.