I just busted a radiator hose...

[gh6o6]

what i would do:
drain all the water you put in
you may as well ge a hose adapter and flush the system while your at it

right from the back of the coolant bottle:
TO TOP OFF

remove the coolant recovery tank and fill to the FULL COLD mark.  Also add to the radiator to within 1" of the radiator neck.  Replace recovery and radiator caps securely.  If coolant recovery tank is consistently low, have the cooling system checked for leaks.

TO DRAIN AND FILL

1. DRAIN
draining removes loose rust and sediment from the radiator.  Drain cooling system following owners manual.  

2. Fill
Install prestone precision blend premixed antifreeze/coolant.  Run engine to normal operating temperature with heater on high.  Shut off engine.  Allow to cool.  Check coolant level.  Add Prestone precision blend premixed antifreeze/coolant as necessary.  Remove old coolant from recovery tank and fill with  Prestone precision blend premixed antifreeze/coolant