If you ever want to play DVDs on Debian Squeeze

Here's how you do it!

# <-- Are comments. You can actually copy all of this, below the sources.list link that needs to be added, into a bash script and it'll theoretically run.

#Add this to the /etc/apt/sources.list

deb http://www.debian-multimedia.org squeeze main

#After doing that go into the console and use the following commands

sudo aptitude install update

sudo aptitude install debian-multimedia-keyring

#Update list then install libdvdcss2

sudo aptitude install libdvdcss2

#Don't forget to upgrade!

sudo aptitude upgrade

#You're good to go!

If you got any issues with it let me know with a comment on this post since this all worked fine for me.