Nice find . Unfortunately, if you've lost your wimax RSA keys, and don't have a backup, you'll never get them back. This guide will not help you with that. This particular guide is for people who backed up their wimax keys using a method described here. Basically, if you've created a wimax.img using the method in that rooting method, then this guide will help you restore it. The reason this guide exists is because some people made that kind of backup, never made one in recovery (that included wimax, at least), then needed to restore their wimax RSA keys. They still had a valid backup, though, just in a different format.