How do I include a file that is not a .h, .c or .cpp file? I am using the ADF7030 on the breakout board (not motherboard) and I am trying to interface it with an Arduino Uno. I want to load the transceivers configuration file onto the chip using SPI. To do this, I need to include the ".cfg" file but when I use the C style array (as in the datasheet - code below) it says that it can't find the file in the .ino sketch.

const unit8_t Radio_Memory_Configuration [ ] = {
     #include "Settings_ADF7030-1.cfg"
}

How could I include this file?
From looking at the arduino-builder source only files with the following extensions are copied to the build directory: .ino .pde .h .c .hpp .hh .cpp .s

So you will need to use one of those extensions.