USB Gecko Card
From OzModChips Wiki
There is a manual on the software CD that has instructions.
USB Geckos official website
[edit] Quick Guide
1. Install drivers on your PC (sound on Software CD)
2. Burn a copy of the 'launcher' - USB Gecko Firmware Vx.x.x (Zip file contain x.x.x Tool, Dol, ISO), it should be 1.4gb, so burn it on a DVD of course. (PAL verison, or NTSC if you have a moddchip with region override) - click here to download
3. Open up gecko-tools on your PC (make sure the gecko is already connected to the PC)
4. Stick the USB gecko in SLOT- B, not slot-A!
5. Turn on your wii and load the launcher. It should appear as a gamecube game if using on a Wii. Click Start. The program should say 'Waiting for Command From PC'
6. Eject the disc from your Wii, and then insert the disc you want to backup.
7. On your PC, in gecko tools click 'Extract DVD'...