Change clr of selected text Acrobat 6.0

Hi,
We use adobe acrobat 5.0 for one of our application and one of the preconditions is that color of selected text must be yellow. I was able to do that by changing windows setting to do so.
Now we are moving to Acrobat 6.0 and the it overrides windows setting for selected text color and leave it black.
I need selected text mind you not highlighted textto show yellow.