When you have serious hooking issues (other than in vegas) it probably has little to do with the swing path. More often than not the swing path from the take away to the end of the back swing is just a small part of the issue.
Jim Furyk has taught us that the back swing does not really mean much. Most hookers eliminate "casting" as most of us associate it with slicers. Guess what? You are probably casting the club when you are transitioning from the backswing to the downswing. Low handicaps will counter the cast and hit hooks.
The key to stop hooking (other than in vegas) is to stop the nasty casting. Pay close attention to your transition and feel free to take an inside line on your down swing. Try keeping your spine angle during the complete swing and keep your hands somewhat close to body during the downswing. Also ensure your club head is moving before your arms start moving back at the start of your back swing.
Let me know how this works out and I tell where to send the cheque