Hi, I'm currently using this setup:
Fanatec Forza Motorsport CSR Wheel with the associated pedals and shifters (H-pattern and Sequential)
The H-pattern shifter is connected to the wheel, and the wheel is connected through the drivehub and then PS4.

I am playing:
Driveclub VR, Dirt Rally, The Crew 2, GT Sport and Project Cars
(everything works great)

My problem:
I want to use the H-pattern shifter for shifting gears (obviously) and the sequential shifter as a handbrake, but no luck so far..
The shifter has a PS2 connection, so I bought a "PS2 to usb adapter" to connect it through the drivehub's "accessory port", but nothing...

Anyone gotten this to work? Help..