I put a spoke in my old garage sale bike a couple of months ago. It wasn't on the drive side, it was actually broken because the bike was riding on a rear rack when the car was in an accident and that's how the bike made its way to me. I took the old spoke pieces out and measured them, bought a new spoke, threaded it in and tightened it. You have to look at the adjacent spokes to see exactly how to thread the spoke in but it isn't difficult. I have a Park spoke tension meter so I tightened the new one until its tension matched the other spokes and the wheel works great.