Check out this tutorial on programming a bootloader. Since you just have a chip you will not have the second Arduino board, just check the pinouts and connect to the correct pins
You don't want to do that if you're using the Arduino as an ISP programmer ("ArduinoISP")
You’d only want to do this (and only “maybe”) if you’re using the FTDI-hack that lets you use the FTDI chip itself as the programmer (with special PC-side software.)