This howto is version-agnostic (presuming 10.0+), as the tutorials are demarcated into version sections. Firstly, there is adding the relevant Package Sources:
http://opensuse-community.org/Package_Sources

This will add:

• Online Source
• Packman
• Guru

Once your package sources are enabled, you can then simply install the necessary packages you will require for enabling certain Restricted Formats:
http://opensuse-community.org/Restricted_Formats

This includes:

• MP3 Playback
• Playing Encrypted DVDs
• Playing DiVX/xvid videos, and
• Windows Codecs

For more information on openSUSE-Community.org, see http://www.suseforums.net/index.php?showtopic=30401