Thanks very much for your reply. I was running the AMP build before I switched over to PX4 on my pixhawk and used the MWscarab minimosd FW and that worked fine, when I switched flightmode it would display the correct mode on the OSD.
Anyway, my knowledge of coding is almost zero. I can just about upload FW via the Anduino software to the board, so I'd need quite a lot of hand holding, but I'd really appreciate any help that I can get. Thanks very much.