Waninkoko continues to dish out controversial yet inevitably-popular apps for the Wii. This time he's released the USB Loader program, which allows users to load their ehem backups from their USB storage device. Note that you'll need Custom IOS36 rev 09 for this (which is included in the download).
The description given in the readme is very straightforward: "USB Loader is a Nintendo Wii application that allows you to install and boot your backups from a USB storage device." Here's a video to show you how it works:
Download: USB Loader v1.0 with cIOS36 rev9