Wish i knew how if its as simple as finding the same 2 areas in the open boxs firmware the 6 18 12 one where it says antenna set up and then switching it with a antenna set up from a different firmware that has the choice to blind scan h or v or both,,,,, using some of those ali program the european site dudes made
for all i know dr zin you can master this quest of opening both firmware in a program and switching around the area and wala !