ok, you are obviously new here so will just direct you to the right place (right section, but tuts is here):
http://forum.cdrsoft.cc/forumdisplay.php?s=&forumid=28
They will explain everything you need for the best quality.
Some things to note:
You must first rip your DVDs to your HDD as the vob files. Then you must use another program to convert them into mpeg or avi/divx files.
Again, depending on what you want to do, you will have to follow the tutorials.
Good luck & have fun. If any problems, post again & we (myself & other here at the forum) will gladly try to help/point you in the right direction.
PS
also before posting a question or some news/info, use our search button to see if you topic has been covered before.