That restriction pretty much eliminates most of your options IMHO.
The “out of the box” way to get this is to install balbes150 multi-3in1 image as per this thread. But you deny yourself the elegant solution if you wont install a new image 
That restriction pretty much eliminates most of your options IMHO.
The “out of the box” way to get this is to install balbes150 multi-3in1 image as per this thread. But you deny yourself the elegant solution if you wont install a new image