Once all files are saved on HDD, I suggest to use AutoGK to convert them in 700MB avi files.
You only need to load each episode on AutoGK, then it will make all the work
Usually, each episode is stored in a separate VOB set, so you should load the corresponding IFO file in AutoGK.
For example, the original DVD contains the following list of files:
Each VTS set correspond to an episode, so is pretty easy to distinguish between them. In this example, files to be loaded in autoGK are: