Just upgraded mine to TMCC using an ERR Mini Commander 2. About as easy as it gets. There are cutouts for a speaker and program switch. The poles are insulated from the body and its just a matter of connecting the antenna wires to them. No sound yet as I have to try and find a suitable board.
PS2/3 would be difficult due to the fact the motor is a 50 cent flat starter set mabuchi with no flywheel so a different motor would have to be used.
Pete