240sx coolant inside the floor???!!!

well as it says my 91 240sx is leakin coolant inside the floor on both the drivers side and passenger.....yesterday the radiator cracked....i replaced it.....it was ok i thought......but i wake up this morning to find coolant inside the floor and quite a bit too.....im going to work in a min and havent had time to really get into it so suggestions would be good while im gone.....thanks.