I have searched the forums and didn't see anyone that asked this question or maybe I missed it. How do you only allow certain modes, like Window, Full Screen, and turn the others off or whatever combo you want? A problem that I have found is that when I go to full screen mode it sometimes messes up the Virtual machine stuff, for instance if I install Windows Vista 32 bit and then go into full screen, control panel shows nothing but a blank window and right clicking on most items does nothing. In Ubuntu Netbook remix you have to right click to get things to work, left mouse gets screwed up.
I don't think there's a way to do that. I have prevented certain parallels services from loading at Windows 7 startup by renaming them or using msconfig, but that applies only to Crystal and Coherence views.