An essential tool for any PC user is, without doubt, a good DVD ripper so you can extract the videos in each of your DVDs. You can then convert it to other video formats. If you still don`t have any program to do this, then not a bad option is this SocuSoft DVD Converter Pro.
With SocuSoft DVD Converter Pro you can rip the DVD videos and convert them to other more compatible and popular formats, like AVI, MPEG, 3GP, WMV, MP4, RM, RMVB, MOV, VOB, DIVX, XVID, etc.
It is also interesting that with SocuSoft DVD Converter Pro you can extract just the audio from the DVD and save it as an MP3. Also, you can personalize the characteristics of the resulting video (and even change the properties of the video and audio independently).