I created a quick website (if you click on the link you will see exactly how quick) for creating a list of checksums for certain potently dangerous wii files. Not saying that installing these files is a bad thing to do but just to let you guys have a way of verifying that the files you downloaded are as close to the original files as possible there for limiting the chance of a brick.

Wii Files Checksum List:
Wii Files Checksum List