The load cell you mentioned Load Sensor - 50kg (Generic) - SEN-10245 - SparkFun Electronics in principle would work you would probably need multiple cells to get the capacity required. Most load cells require an instrumentation amp to amplify the signal coming from the wheatstone bridge inside the load cell. I have had good luck using TI's INA122 for this type of application. The output from the instrumentation for each load cell would be wired to analog input individually. To read the total load (weight) you would read all of the load cells convert the voltage read to weight based upon your calibration data, add up all the weights after conversion.
wade