Use the "Viking 360 Legacy HEX File Maker" to generate a .hex file for your Odin's Raven.
Then use the Viking Flash tool to program your controller with that .hex file that you created. The video above explains how to get your Odin's Raven (formerly known as the "duo") into programming mode. Insert the batteries, hold down the right tac switch while powering up the controller. You'll notice LED3 and LED4 turn off. Then you can plug your 3.5mm-to-USB cable into the controller and your PC. The Viking Flash software should now recognize your modchip.