Don't know much about TheGreenBow, but I do know that VMWare Player works with Windows 7 (both 32-bit and 64-bit) and can do Aero as well. And it's free.
Also, exactly what is the issue that you are experiencing with Windows 7 not working? What is the program telling you that makes you believe Windows 7 isn't working? Looking at the web page, I agree with what you stated in that this program is supposed to work with Windows 7, but you haven't really given any specific information as to what the issue you are experiencing is.