IS MY HEAD GASKET GONE FORD MONDEO 1.8 P REG?

CAN ANY ONE HELP. WE HAVE A MONDOE 1.8 P REG A NICE FAMILLY CAR THAT WE NEED,ON A RECENT TRIP TO MANCHESTER WE HEARD A NOISE AS I WAS PRESSING ON THE ECCELERATION PEDDLE. WHEN I DECREASED IT STOPPED. THE ENGINE STARTED OVERHEATING WITH OUT THE TEMPERATURE GAUGE GOWING UP FINNALIY IT CUT OUT. AFTER LIFFTING THE BONNET THE WATER WAS BOILING OVER AND EVAPERATED. THE R A C SAID THE GASKET HAD GONE HOWEVER THEIR IS NO WATER IN THE OIL AS USUALL WITH A BLOWN GASKET. GOT TOWED HOME?NOW THE CAR WILL NOT TURN OVER THE ENGINE IS NOT SEIZED UP AS I HAVE CHECKED.IT'IS SPARKING, PISTONS MOVING UP AND DOWN, AND THE TIMMING BELT IS STILL ON. PLUS THE HEATER BLOWS COLD WHEN ON WARM,AND THEIR IS WATER IN THE PASSENGER FOOTWELL? HELP PLEASE BEFORE I SPEND HUNDREDS IN A GARAGE R CAN I DO IT MYSELF WITH A GASKET KIT