Stumped reading mulitple DS18B20's

Using Arduino Sensors
4

This may be your problem:

     if (!sensors.getAddress(Sensor1, 0)) error();
     if (!sensors.getAddress(Sensor2, 0)) error();
     if (!sensors.getAddress(Sensor3, 0)) error();
     if (!sensors.getAddress(Sensor4, 0)) error();
     if (!sensors.getAddress(Sensor5, 0)) error();

I suspect that getAddress gets the address at the given index. Since you've provided the same index in each case, your addresses are being overwritten with the 0th device on the bus. Since you already know the addresses, these calls are superfluous anyway.