You could go that way, but you might have difficulty seeing the school. It is set back off the road quite a bit. I would suggest following Mapquest's instructions, but instead of taking the IN-67 exit stay on I-465 until you reach the Airport Expressway. Take that east (thats a right from your direction) to Lynhurst where you will go South (another right). By coming in this way, you should see a sign for the frag swap on the left hand side after you go through the first light.
You could also stay on I-70 through Indianapolis (not getting on 465) and take that all the way to Airport Expressway. The first exit after getting on Airport Expressway is Lynhurst, which you have to do a funny loop to get onto going south. If you choose this way, you might want to zoom in using google maps so you can know what to expect at the Lynhurst exit.
Ultimately, we are trying to keep people from coming to the school from the South on Lynhurst because we are afraid they won't see it. If you do decide to come from the south, just know that if you hit the Airport Expressway, you have gone too far.
P.S. 67 and Kentucky are the same road.