This is what many people want when hacking the Wii. Backup launchers are able to run copied versions of games. Like this, original games won't get damaged.
And of course the main users of Backup launchers are the Pirates, but don't be foolish enough to be one of those.

Key:
Originals - Plays original (retail) games
Backups - Plays backup games
Wii - Plays Wii games
Gamecube - Plays gamecube games from DISC
Disc - Plays Wii games from disc (and GC ones if the above is green)
SD - Plays Wii games from SD card
USB - Plays Wii games from a USB device
WBFS - Supports loading games from WBFS partitions
FAT32 - Supports loading games from FAT32 partitions
NTFS - Supports loading games from NTFS partitions

► Installation -- How to get started with backup loaders

► Disc Backup Launchers -- The first generation of backup launchers allowed you to load Wii games that are burned on a disc.
    ♦ Gecko OS -- Basically just a disc launcher. Can load backups if cIOSCorp is installed.
    ♦ SoftChip --  High compatibility loader and great alternative for Neogamma.
    ♦ NeoGamma -- An all-in-one disc loader that has many features and the ability to load from SD/USB as well.
    ♦ DARKCORP -- Tired of having to launch your disc backup launcher every time to play a game? Load them directly from the disc channel!

► USB Loaders  --  Backup Launchers that load games of a USB device or SD card

    ♦ USB Loader GX  --  An amazing loader with many functions.

    ♦ Configurable USB Loader  --  A loader which is customizable in almost any way.

    ♦ Wiiflow  --  A very good looking loader based on coverflow.
    ♦ uLoader -- Loader created by Hermes himself. Has many features and an alright GUI.
    ♦ Loadstructor -- Add shortcut channels directly on your System Menu to play games via USB.
    ♦ Crap -- Channel creator that loads settings from other USB loaders and supports FAT/NTFS drives.

► Manage ISO Images -- How to use your ISO image files correctly.

    ♦ Burning an ISO onto a disc -- How to burn a backup disc.

    ♦ Dumping a game -- How to use your Wii to dump commercial Wii games.

    ♦ Extra Setup for USB loading  --  What to do with your USB Drive before you can use it.

        ♦ FAT/NTFS for Windows -- How to use a FAT drive for USB loading on Windows.

        ♦ WBFS for Windows -- How to use a WBFS drive for USB loading on Windows.

        ♦ WBFS for Mac OS-X -- How to use a WBFS drive for USB loading on Mac OS-X.

    ♦ WBFS Managers  --  Add ISO's to your Hard Drive.

        ♦ Wii Backup Manager -- A Windows program that supports FAT and WBFS drives, as well as ISO, CISO, and WBFS images.