I use Parallels 5 with the Bootcamp installation of Windows 7 Home Premium (32-Bit) on a MacBook (late 2007) with Snow Leopard and 4 GB RAM. When started in Bootcamp Aero works fine, but in Paralles 5 there is no Aero. I have set the memory for the virtual machine to 2 GB and for the virtual video card to the maximum (256 MB). Anything else to do? Aero was the only reason I did the costly upgrade, so please fix the problem!