Pimp My Wii is an app that will install missing and outdated titles to your Wii console. The program will detect missing or outdated IOSes and check that you have the latest version of the Wii System Menu. It also checks if you have the latest Wii Shop Channel. If you don’t have the latest versions of those titles, the program will download or read them from USB or SD, and install them. When using this program, you will have all advantages of 4.1 cumulated with those of 3.2, and this without drawbacks!

The program is automatically displayed in English or French depending of your Wii’s language. It is also compatible with NTSC-U, NTSC-J and PAL Wii consoles. (Korean Wii is theoretically compatible, but IOSes specific to this version will not be installed).

Changes:

Correcting a bug that made 3.3 and 3.4 Wii without any IOS containing Trucha Bug unable to downgrade IOS15.
Correcting a message about an outdated cIOS.
If Your IOS 249 is a stub (with a official 4.2 update), it will tell you that you don’t have any cIOS.
Another check to verify that the loading of the “best” IOS has worked.
Adding the new title id of HBC to verify that it has been installed.
Added IOS 70 and the update of every other IOS.
Still install 4.1, NOT 4.2.
Updated the Wii Shop version to v17.
No more patch on IOS 61 to prevent problems with Wii Shop and to let Homebrew Channel use it (without upside down).
New stub verification based on size of IOS.
It now tell you which IOS are stub.
Internal improvement of the default choice for IOSes patches.
Let you navigate through the list of IOS with “minus” and “plus” (or Trigger L / R for GameCube pad).
Now detect if IOSes 30, 50 and 60 are stub (non usable) and install an older version (non stub, so usable) and replace the revision number inside. It may prevent brick if you install a lower System Menu without installing associated IOS (or if you downgrade your Wii then upgrade using a DVD of a game).
Now prevent installing System Menu 4.1 if your IOS 60 is a stub.
Downgrade of IOS 15 now works for Wii 4.2.
Added a description of each choice in the menu.
Added an “minimal installation” mode to just downgrade IOS 15 if necessary and patch IOS 36 to include the trucha bug inside.
Added an individual description on each IOS when asking for install.

http://wiibrew.org/wiki/Pimp_my_wii