Hi Rubik, sorry to hear you are still having issues. I thought you had already installed the Homebrew Channel and only looking for help with installing wads.
Anyway, for USA, the HomeBrew Channel ISO link is:
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After extracing iso using Winrar, Burned it on DVD using IMGBURN at 2.4x speed. Insert DVD in Wii and follow on screen instructions. This should get you the HB Channel. If you are having problems with DVD not being read by Wii, then try different brand of DVD, slower buring speed and even a different DVD burner.
For the Wads, get the SD Content file from the following link and unrar it using Winrar and copy all the files to the SD Card.
[Only Registered Users Can See Links. Click Here To Register]
Add any other Wads you want to the "wad" folder.
Insert the SD Card in the Wii, click on the home brew channel. HBC will read SD card then show you Wad Manager, click on Wad Manager, this will list all the wads that were placed in the "wad" folder. use Up/Down to point to the wad you want to install, then press + button to install.