Ciao :D
DVD Support (codecs required) means that BSplayer is able to handle all the DVD stuffs (menus, subtitles, audio streams selection, extra-contents, etc.), but to play it you need an external MPEG-2 codec (to decode the video stream, and maybe also AC3 Filter to decode the audio stream)
Take a look at
BSPeter's
"READ THIS FIRST BEFORE POSTING" post and search for
adicoto's list of codecs (item
(4)), there you'll find 3 links to 3 MPEG2 codecs (I suggest you to use Elecard one)