Replacing one narcotic with another? I would strongly suggest you not do that.
Cold-turkey *****, but it's the best way to completely rid yourself. If you replace your methadone with fentanyl, you'll just be posting again in a few weeks asking us how to wean yourself off the patch.
My 2 cents.
I am not a doctor, but my opinion is..DON'T DO IT!!!! I detoxed off of fentanyl cold turkey and it sucked. I would not wish that on my worst enemy. Please think very hard about this decision....and el_em_en_oh is right, you will be back asking how to get thru the terrible w/d symptoms in a few weeks. Be careful and take care.