If this was clarfied before I missed it as well, but i needed a way to change the color of the mouse over. For example I have the Power blue skin instaled as my default. The mouseover did not show up because Alt1 and Alt2 were the same.
I went through and changed Alt 2(in red)
PHP Code:
onmouseover="this.className='alt2Active'"
to .legend in my case. To try a diffrent color, in your CSS options each table has a name in the bottom left corner of it. Just try those various classes in place of Alt2 untill you fidn oen that works.