Vista - Static Driver installation

I had developed a static driver for Windows XP which will get loaded during
OS boot up. This driver does not require any physical hardware and it gets
loaded due to manual registry entries created under
HKLM\SYSTEM\CurrentControlSet\Enum\Root.

Now in Windows Vista it doesn’t allow me to create registry entry manually
under the enum \Root key due to rights restriction. Finally I was able to
create registry entry thru a kernel code. After system reboot I can see
device enumeration I provide the path to my static driver it loads the driver
but in the final screen it says “Installation of the device forbidden by
System policy �. Is there any way to make driver load during boot time
without even a device in Vista?? Kindly help me out in this.