Well I managed too suss it.
For anyone thats interested
For the Tristar 777
On the PTZZ080AOX
Remove the wire that jumps from  to the cathode of D4
Add a 1N4148 diode in D4
Remove the one end of R13 [The end closest to D3] and connect the free end of R13 to ground.
Remove the pin marked  [this is the constant voltage from the mode switch when on CW]
The now free hole  connect this to a constant voltage of around 8v
Remove the pin marked  next to the relay [this comes from the TX pin on the mic socket]
Connect that wire [usually purple] to the pin marked [P] Theres already a pin in the hole [P] which goes to the CW socket, Leave this in place.
Remove the wire from the hole marked  and put this in the now vacant hole 
Thats it you should now have a Nato 2000/Hygain 8795 beep, The duration of the beep is a little longer than normal but changing the value of C1 22uf to a 10uf was about the best.
This should also work in the Superstar 2000