Alignment Stars/Objects for Autostar

Because I have a lot of trees in my yard, I can't always use the Easy Alignment or Two Star alignment procedure for my LX90. And the one star alignment method is not very accurate. Assuming that I use the set up procedure of leveling the scope and pointing it North, is there a method for aligning the telescope by selecting stars that are not in the alignment database? In other words, can I just pick a known star or even a planet and "tell" the Autostar what it should be looking at so that it will know its position?