follow up: Acanthosis Nigricans

I  am a 22 year overweight male w/ a family history of diabetes. I posted a questions regarding AN about a month ago My AN has been accompanied by a very foul smell that is omited from my inner thigh/scrotum area. When i mentioned this to my Dermatologist, I was told that because the skin is thicker in that area ( and around my neck and under my arm pits), more bacteria builds up and as a result some odor can is created. I received a reply to my post ( http://www.medhelp.org/posts/Dermatology/Acanthosis-nigricans-/show/964675)
and some canasteen cream was recomended. I tried the cream, the 3 day treatment but it has no effect. Is there anything else I can try that might help? I too have the suspicion that it is some kind of fungus since I will shower and less than an hour later, I begin smelling really badly down there. I do not have much money, but I can make an appointment with a dermatologist again, i just want to make the best of the visit and get as much help/guidance as I can get before having to cough up so much money. Please, any input on this will be very helpful and really appreciated!