I was browsing the internet looking for an app that will allow me to rip and re-format my favorite dvds for PPC use and stumbled upon this app. It works really well and resizes the movie and converts the format from ISO to MP4 or AVI or 3GP or whatever you want it to be in almost every screen resolution. It's really a great app but unfortunately is not free.
Here is the link:
http://www.dvdfab.com/
http://www.dvdfab.com/dvd-fab-platinum.htm
I personally bought the platinum version because I have many different devices to put movies on, IE: ipod, vogue, upstage, etc...