Hey, this one is definitely on the wishlist and has pretty solid support. We need to get the airways added first, and we also need to add more data to the vector mode. I've already built the Navaid images for the guys, just waiting it's turn for coding it up.
I'll look at how it's being done with others, but I suspect it should able to be done. Basically, we'd just be treating the airway as a preferred airspace, and to keep you inside it, rather than out of it. We just need the VFR airways added with their shape detail, etc.
Unfortunately, I can't give a timeframe on this as we've got some big features to add... Seamless Charts, Flight Filing, Fuel Prices and more coming soon.