hello there soma. Right the first thing you need to do is use a program called smart ripper and rip the movie files to your hard drive. Once you've done that depending on the size of the movie files, you either burn them. or use a program called info edit to rip subtiles/other langauges. and then it might fit, if not you have to split the sound from the video and recode the video , this can take hours (normally between 5-16) depends on movie lenght and computer Spec.
For more indepth info and where to get the programs you need check out this site:
http://www.vcdhelp.com/dvdripping.htm
but you if you still need anymore info or help let me know
tri_94********com
hope this helps
Good luck
p.s. if you can't find the programs you need , let me know