Colin:
There is a greater range of options.
I found these two pages on MSDN
ENABLING TEST SIGNING
http://msdn2.microsoft.com/en-us/library/aa906238.aspx
That is the one suggested by "chinga69"

Installing an Unsigned Driver During Development and Test (Windows Vista)
http://msdn2.microsoft.com/en-us/library/aa906338.aspx
This one even includes a registry modification to allow unsigned drivers to
load on a permanent basis.

Carlos
"Colin Barnhorst" wrote:

> F8 during starup and select the option to turn off the unsigned driver
> check. This is not a persistent setting from one reboot to the next.
>
> "Kue2" <h.j.kennedy@sympatico.ca> wrote in message
> news:OjVMGJKQHHA.4672@TK2MSFTNGP06.phx.gbl...
> > How do You stop Vista from Blocking unsigned drivers? I want to beta test
> > a program & Vista keeps blocking the unsigned drivers.
> >
>
>