Sorry, a couple of studies from 35 years ago that used
aversion therapy don't prove anything. There are reasons that aversion therapy is no longer used in the modern world, largely the fact they were completely ineffective. Of course the studies reported successes -- they were often treating people under court order that required them to change. Further, the "therapy" was electric shock in combination with nude pictures -- basically the people in therapy were learning to react to make the pain stop. For all the talk of Guantanamo, we don't torture terrorists this way. Of course, long term studies found that there was actually no change in the sexuality of the individuals tested, which is largely the reason this type of therapy hasn't really been used since the mid-70s and is illegal in pretty much every Western nation.
Now, using modern studies the evidence indicates that no more than 3% of homosexuals are capable of any real change (at least according to one of the researchers, Spitzer, who is lauded by NARTH for saying change is possible).
Though I must admit how odd it is in the 30 years NARTH (who claim they are a scientific organization) has existed, they have never managed to conduct a truly scientific study that proves that they, or the ex-gay groups they represent, can change a persons orientation from gay to straight. (Again, which is why the hype the Spitzer study, despite the fact it doesn't really prove their claims).