http://wiibrew.org/wiki/DVDX
use the 3.4 one.
What about if one wants to use USB2.0 and needs the 'advanced' option to select ISO202?
This is from the mplayerce 0.5 README.txt
QUOTEUSB 2.0:
You need to install the USB 2.0 cIOS from
http://wiibrew.org/wiki/CIOS_usb2
You must then then reinstall DVDX
http://wiibrew.org/wiki/DVDx using advanced
mode and selecting IOS202. Even if you don't plan on playing DVDs this is
necessary for MPlayer CE to detect if the cIOS is installed.
Users with system menu 3.4 or higher will not be able to use USB2.0 with
MPlayerCE because the DVDx installer for 3.4 does not have an advanced mode.
Unfortunately there is nothing we can do about it.