If you want to detailed studies why not contact Exodus and read the articles from men and women who have totally changed? Morgan, you may not be dealing with the issues that many gay men and lesbian women have had and found they could change.
As to Spitzer's study he has stated his findings are not conclusive and has called for further studies, which the APA is loath to do. Professional pride is found in science and this pride is keeping real studies from being done. Spitzer came to understand that men with deep religious convictions can transform their sexual orientation with proper support and counseling.
Just because you are not looking for the reason you are a lesbian does not mean other people in the gay community are not. If you are really interested in the truth and the happiness of all people why not work to get gay activist's to back such studies? If they are so sure their are no psychological roots for some people being gay why do they fight such studies? This reminds me of how hard gay men fought believing that HIV is sexually transmitted. When real sience is concerned with truth and not pampering one segment of society the truth comes out. The only treatments that are harmful to those seeking change are chemicle and electro-shock therapy. Reparative therapy in the hands of a qualified professional counselor is effective for those who are motivated to change for the right reason. And acceptance from society, family, or a religion are not the right reason. The men and women I know who have transformed their sexual orientation did it without consulting a psychiatrist or psychologist because of the uncertainty of the counselor's real agenda.
When I was diagnosed HIV+ my doctor told me I was taking the diagnosis to calmly and referred me to a counselor, who after I told him I was ex-gay attempted to change my mind. All he wanted to do was convince me I could not change, and this after I had already changed my sexual orientation. My next AIDS doctor sent me to a psychiatrist who did the same thing. Needless to say I did not attend many sessions with either professional counselor.
When people seeking information contact me, I always determine the motivation behind their desire to change before we get into the process. I always recommend they read "Desires In Conflict" by Joe Dallas. If their reason is societal, family, or religious acceptance I tell them to just accept themselves for who they are and enjoy their lives since their reasons are not strong enough to produce a lasting change. The process is neither quick not easy and unless people are willing to make personal sacrifices they will fail. In other words, if their only goal is to go straight the process is a waste of time, effort, and emotionally draining.
Then thier are those who cannot find any root causes for thier gay orientation and choose to live celibate lives in obedience to God and His revealed will for mankind.