If methadone isn't helping with fent wd morphine definitely won't. However, if you want to know- I believe the process is taking the opium and dissolving it in alcohol, filtering, evaporating, adding a base (until a pH of 11) dissolving both (o/base) in warm water and letting it come to room temperature, acidification to 8.5-9.5 pH and using benzene or toluene to pull the morphine out of the aqueous layer (could probably do a second pull on the used opium mixture). Then to get it to "h" (6mam in this case) you would want to take the solvent and freeze precipitate (less waste) or evaporate to get the morphine (semi pure with a few other alkaloids).
With the morphine you need to add 1/10 the weight of the morphine in organic base (such as lime) and add a bunch of glacial acetic acid (not controlled like anhydride, and too much shouldnt hurt more than being wasteful) until it acetylates the 6 position of the morphine. At this point you have black tar, a non pure version of 'heroin'.
Of course I've never done any part of this so wouldn't know if it works or weather this method is worthwhile. Read what erowid has to say about the first part (extraction) Don't just take my word for it.