I get asked a lot what to use to copy movies. Firstly you should know that to copy protected movies is illegal. Even to make yourself a back up copy of the movies. Even if you just want to put the movie onto your hard drive or portable movie player. Having said that, I use a paid program called DVD Fab 5 Platinum. DVD Fab 5 There are free programs out there but I have never found one that works easily in some cases, at all.
DVD Fab will allow you to copy a DVD, place it on your hard drive or portable player. I use it to put movies I purchase onto my IPOD Touch. It will eliminate the copy protection and encode it to a format that will play on my IPOD. Be advised encode a movies onto a portable player takes time. It's not a quick process but it is very easy.
The Platinum version will set you back 50 dollars.