Rainbowduino Firmware update problem

End-Of-Life Products & Services Tech support before 2012
5

I have the ATmega328 Rainbowduino

Wire-connection:
9V pin to Rainbowduino Vcc
GND pin to Rainbowduino GND
Arduino RX (pin 0) to Rainbowduino TX
Arduino TX (pin 1) to Rainbowduino RX
Arduino RESET to Rainbowduino DTR

What is a BareMinimum sketch ? it is an empty sketch like this:

[code]void setup() {}

void loop() {}[/code]
Then i have all right done or?