Akara,  unfortunatly, I have not ideas to help, but your situation sounds alot like mine.  I do have a great memory, but it doesn't matter, if he doen't remember somthing then it never happened.  One thing I started a few years ago when I needed his approval on something (that he says he never got).  I would write out exactly what I needed on a post it note, with the date and time I gave it to him.  I would then copy this and keep it in my personal file.  That way when I needed an answer, I would walk into his office, with the copy and ask him about it.  I didn't always get an answer, but at least I had back up that I gave it to him in the first place.

If you come up with anything, I am open to suggestions as well.  Until then, Hang in there, you are not alone!