brainstorm:
Thanks for your time johnwasser.
Since both my atmega328P are set to external crystal, how could I use one(into the arduino board) as ISP to burn a 8mhz(internal clock) bootloader on the other(bread board minimal configs)?
You need the crystal and load capacitors on your breadboard until you get the fuses set:
Hardware setup:
http://arduino.cc/en/Tutorial/ArduinoISP
Software instructions:
http://www.arduino.cc/playground/Code/MegaISP