What I did is:
Take clean wii already updated to system menu 4.2
Use bannerbomb to install hackmii v0.6 to get HBC and DVDX.
Get mplayer (also tried mplayer ce 0.75 and 0.76)
Try to play dvd, it did not work.
I did NOT install bootmii.
After doing more research, it sounds like I might need to get cIOS 202 (which mplayer CE relies on)???? I do not have a USB connection to the wii, so I am not sure about this. The things that I think may be an issue:
1) do I need to install bootmii?
2) do I need cIOS 202?
3) is it possible my wii will not allow any DVD playback (even for store-bought DVDs), and how can I tell?
Also, when the screen hangs while using mplayer, and I click on the home key, I get the following dump:
Playing dvd://.
libdvdread: Using libdvdcss version 1.2.9 for DVD access
libdvdcss debug: opening target `/dev/di'
libdvdcss debug: using Erant's DI API for access
libdvdcss debug: DI: initializing dvd...
libdvdcss debug: DI: waiting for device to become ready...
libdvdcss debug: DI: dvd not ready: 0x4
libdvdread: Could not open /dev/di with libdvdcss.
libdvdread: Can't open /dev/di for reading
Couldn't open DVD device: /dev/di (No such file or directory)
No stream found to handle url dvd://
Please help!!!! I am not so wii savvy, but I can follow clear directions. Thanks!