I had a bit of a crack on my own and came up with similar results
from the PF_IR protocol there are 8 Modes only 4 are for driving motors COMBO_DIRECT (MODE 1) SINGLE_OUTPUT(MODES 4 AND 5) AND COMBO_PWM
On the SEND_IR_MESSAGE block there are 4 slots SLOT_1 is the port the boost sensor is attached (A -D)
PF_IR_TX address is selected in SLOT_2 (0 - 3 equiv 1 - 4 on PF_IR) except in COMBO_PWM mode
MODES 1-7 are selected in SLOT_3
INPUT 0 - F in SLOT_4
COMBO_PWM and PF_IR_TX address is selected in SLOT_2 (4 - 7 equiv 1-4 on PF_IR)
INPUT_B (BLUE) 0 - F SLOT_3
INPUT_A (RED) 0 - F SLOT_4
