Pixhawk vtail 500 firmware

hi guys,
im wondering if anyone can help me out with setting up a pixhawk for a vtail (specificlly - my frame is the lynxmotion vtail hunter 500). ive looked around and found people saying about changing the FRAME type to 4 but ive been unable to finid that setting in mission planner, ive tried looking in qground control too but no use.

has anyone has any luck with vtails and pixhawk?

i heard someone mention recompiling the code but im new to pixhawk and relatively new to coding too.

any help would be amazing!

Firstly you should load the quadcopter firmware onto your pixhawk, then during the setup wizard you should be able to select V-Tail as an option in the frame type screen as shown below (under the initial setup tab)