Windows co-opts my scanner dialog

I have a Brother 3420C multifunction machine. When I scan with it, instead
of using the Brother scanner dialog, I get a Windows version. I can't make
anything default on it, have to keep changing the type of scan and paper
size, etc. Brother has opted not to put out a Vista compatible set of
drivers for this scanner, but the drivers in Vista see it and install it and
it all works.

But having to change the setting on the scanner dialog every time is
annoying. Is there anyway to make them stick? I've looked in the help
files, but that seems to only be relevant to scanning into the Windows media
type programs. 99% of my scanning is into PaperPort 8.

Thanks