The easiest method these days to program avr ATtiny processors using the arduino IDE (after modifying the IDE with the required ATtiny support files) is to utilize an inexpensive USBasp hardware programmer ($5) or using an arduino board running the arduinoISP sketch. Then develop your tiny sketch in the IDE and use the IDE file menu option of 'upload using programmer' to burn the sketch into the attached target ATtiny chip. So no bootloader code needed on the tiny.
Lefty