You can use this program to manage/transfer your electronic backups of Wii Games.
It is very simple to use, but a detailed tutorial on using Wii Backup Manager can be found here: www.sites.google.com/site/completesg/backup-launchers/iso/wbfs-managers/wii-backup-manager
Note: Original Wii Discs cannot be read/copied using a computer (unless you have one of the rare LG Drives that is capable of doing so).