In previous versions of Arduino (i.e. 1.5.x versions) there was a way to adding custom boards with editing boards.txt and other files in <Arduino Ins. Dir>\hardware\arduino\avr ..
but in 1.6.2 version (and maybe 1.6.1 too) these files not exists, instead there is a "Boards Manager..." in Arduino Tools>Board that just can add support for other Arduino Original Boards..
now my question is that Is there any way to add custom board in this version of Arduino?