Original WAD Manager (Installation - done only once):
1) Put the ELF/DOL on your SD card
Original WAD Manager:
1) Get your Wii SD card
2) Put it on your computer
3) Search the WAD files on your computer
4) Copy WADs to the SD card
5) Get the SD card
6) Put it back on your Wii
7) Open homebrew channel
Open WAD Manager
9) Select the WAD file
10) Install it
WAD Manager - LAN Edition (Installation - done only once):
1) Install the service
2) Put the ELF/DOL on your SD card
WAD Manager - LAN Edition:
1) Open homebrew channel
2) Open WAD Manager - LAN Edition
3) Navigate through your files
4) Select the WAD file
5) Install it
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It is not useless, in fact, it is easier to install this way! (mostly if your PC is far from your console)