The program will detect missing or outdated IOS and check that you have the latest version of the Wii System Menu.
It also checks if you have the latest versions of BC, MIOS and those channels : Wii Shop, News, Weather, Mii, Photo and Photo 1.1

If you don't have the latest versions of those titles, the program will download them, or read them from USB or SD to install them.
When using this program, you will have all advantages from 4.1 cumulated from those of 3.2, and this without drawbacks.

-luke_c