Hello and welcome!
You can start by flashing the latest TF v6 official BIOS to see if that boots. There are multiple reports that it works fine on v2 and v3 boards.
If that boots and works well, you can basically follow my changelog and implement the needed changes for multiplier overclocking from the BIOS
- OcInit (6540F933-425F-464B-B4AD-B93A6ED0A8F5)
- Necessary items under “Advanced Power Management Configuration”
On a related note, I have just done initial tests with the TF V6 BIOS (5567 based SuperIO). So far I have not been able to make it boot on my more common 5532 based SuperIO board. Stops on error code B7, which is NVRAM related.