In XP, a simple way to make OCDDB open at the maximized position when you open it is through a shortcut. First create a shortcut if you haven't already. You should have one on your desktop or in your quick launch toolbar considering that you should be use the program on a regular basis.

Anyway, Right-Click on the shortcut and select properties. In the shortcut tab, look for "Run:" and right next to it should be a dropdown field. Click on the dropdown field and select "Maximize". Now hit the "Apply" button. Now every time you open up OCDDB thought that shortcut, OCDDB will open up maximized every time. You can also make the shortcut open it "Minimized" or "Normal". You can also apply this to any other program you use, but it can only be done through a shortcut.