But the problem with these wads is that: If you use the emulators and load the roms instead of channel, (for the same game console) you save alot of disk (card) space.
Get the emulator with homebrew browser. Search for the roms, Download the roms instead.
you can get all nes roms for 4 gig.
So for the Wads. They include each time the emulators designed to run only one game at once. so you have the emulator + the rom each time in the channel.
For the other stuff and hard to find roms,it might be worth downloading patials.