Hi Andy,
I'm in the same boat with chewing tobacco. I've tried about everything I know of to be free of that addiction but I keep going back. I even made it 8 months one time.
I think if the aim was changed just slightly to "nicotine cessation" rather than "free of smoking" then the paraliminal could probably work for both, but until LSC (or someone else) does some research into the topic, I guess we'll never know.
Keep up the good fight!
Mike