Updating ios249 with wad manager
The main reason you shouldn't update to Wii System Menu 4.2 or 4.3 is that there is no actual update for anything, just annoying ways attempting to prevent Wii hacking.
to re-install IOS60 (if you are on Wii Firmware 4.0 or 4.1) or IOS70 (if you are on Wii Firmware 4.2) or IOS80 (if you are on Wii Firmware 4.3) with the signature hash check (trucha bug).
If you don't wish to launch backup games, you are done and can move on to optionally upgrade/downgrade your Firmware and/or head over to Wii Brew Wiki to get some fresh, homemade homebrew applications.
Step 6 is only necessary for those on Wii Firmware 4.2, although it also ensures a clean Wii system for all others.
I have both the gct and txt files in 2 locations: the sd:/codes directory and sd:/codes/r/s directory as I'm not really sure what directory it looks for exactly, so I put them in both places.
Instead, the best way to play media content on your Wii (including DVD movies) is via Wii MC.