3.3V / 8Mhz Breadboard ATMEGA328P

I've tried re-installing the IDE (v. 1.0), and i still seem to get the avrdude: stk500_getsync(): not in sync: resp=0x15 error. I've been researching how to burn the pro mini 3.3V bootloader using avdude, but I'm having trouble understanding the syntax. Does anyone know how to correct this error or what the command is in avrdude to burn the pro mini 3.3V 328 bootloader?

-Thanks.