You can't placebo physical dependence away, especially after weeks of use.
I've heard of this technique and wanted to do it ever since I read about it. I'll be very interested in hearing the results, opiates-tolerance-addiction= perfection I think.
I'd also be interested to hear about any side effects you experience. I might however recommend that you start lower on the naltrexone. If 1/1,000,000th of a dose works then there's not really any need to use more then that. Also be careful with the fact that your tolerance will go down if this works, in which case you might need to change the opiate dose.