How to fix a refurbished Wii?

My friend gave me his old Wii, and it is in great condition, and works with all of the new games that I bought. Unfortunately it is soft-modded, he said. It has update 4.2, and has the Home-brew Channel, as well as a program called Darkcorp 1.1. My friend said I probably wouldn't have a problem restoring everything, except for DarkCorp. He gave me an SD card with all of his homebrew stuff for me to uninstall everything from the wii. Now when I open up Darkcorp's files it says uninstall, and in it's description it says " Will uninstall patches". Does that mean if I uninstall this, and then uninstall the homebrew channel the wii will be virginized? Please somebody help me, I want this Wii to be clean!