Good news for this thread! I was able to flash the LV-PB932F4 with the Hikvision DS-2CD2x10,2x20,2x 5.3.0 firmware successfully today on all 6 cameras. I used the TFTP method. I did not try it via the web UI functionality which may work, but I know the NVR can't be flashed to Hikvision firmware...