If you've rooted your HTC Evo Shift 4G, you now have the option of using ClockworkMod recovery, as well as it's simple front-end Rom Manager. With the release of version 188.8.131.52, ClockworkMod recovery now fully supports all the Shift 4G's partitions, and even backs up your WiMax keys.
Getting it all set up is pretty easy -- first you'll need to root your Shift 4G, then hit the Android Market and install Rom Manager. When you open the Rom Manager app, you will be prompted to update/install the latest ClockworkMod recovery for your device. That's it, you're now set up and ready to run a backup and flash custom ROMs and hacks to your Shift 4G, and have an easy restore path using the backup you've made. All without tethering your phone to a computer. [Android Central forums]