This is my curent configuration which I use with CRIUS SE, Frsky telemetry and EZ-GUI. There are two commands added to the serial protocol and few other modifications.

Added commands: #define MSP_SET_SERIAL_BAUDRATE 199 //in message serial 0 boud rate #define MSP_ENABLE_FRSKY 198 //in message no parm

case MSP_SET_SERIAL_BAUDRATE: if(!f.ARMED){ SerialOpen(0,read32()); } headSerialReply(0); break;

case MSP_ENABLE_FRSKY: FrskyEnabled=true; break;