Ripping Games

Ripping disc with computer
If you're lucky enough to have a supported optical drive, you may be able to rip game ISOs with Rawdump. forum thread

Ripping disc from Wii
You'll more likely need to rip the disc using homebrew software on a Wii.
 * Cleanrip can rip a game disc to SD or USB. Note that Cleanrip will often split the ripped disc file into several pieces to fit the SD or USB card's file system. You need to put together the pieces of the ripped ISO yourself, or else Dolphin will not run it (or will just boot to a black screen).