Unable to Upload Sketches to Arduino on Breadboard ATMega328P-PU Using a CP2102

Someone in another post (link below) stated that you needed to use some resistors with the TX and RX connections? Is this correct or would it help?

If so, I only have 330 and 10k resistors at home; would it matter if I used one of these or would it have to be a 1k resistor?

http://forum.arduino.cc/index.php?topic=235568.0


What board should I be using from the drop down menu? I've just left it as the Arduino UNO. I have an ATMega328P-PU, should I be using a different board type, such as the duemilanove?