i have found OFTEN that an addict will say he/she will go to treatment in order to keep the status quo on the home front. then they will sometimes even go. the problem is that if the true motivation isn't there, what they are sitting in (the treatment) doesn't sink in, and if little bits of it do sink in, it doesn't seem to stick.
this is a generalization, and not meant to say "not gonna work, phleg!" or be otherwise negative. but if you can not get your hopes up, it may be helpful down the road.
i like the suggestion of the salvation army program. it is long-term, and especially good for someone who is already out of work, since you do the program AND you work about a 40-hour per week job with them as well. it is terrific discipline. they do want to turn the guys into "saved" kinds of christians - imo - but if that doesn't sit well with a client, oh well. take what you like and leave the rest.