ATMega 328, 8MHz internal osc. board option in 1.6.4

There used to be an option in the Tools->Boards menu for a AT Mega 328 on breadboard that set fuses etc for using the 8MHz internal oscillator. This is no showing up in Ardino 1.6.4 and it seems to be ignoring "boards.txt" in the hardware folder of my Sketches folder.

Anyone got any idea how to get this working?