Autorun CD Disc-Based Web Site in Vista

Not a time-sensitive emergency, as Vista won't be RTM for a couple months,
but...

I'm a small system builder who has always issued a Drivers & Programs CD/DVD
with all systems sold. These CDs are basically simple disc-based webs,
using basic html with an index.htm page, having basic hyperlink navigation
to other pages on the disc for various component driver instruction pages,
along with a hyperlink to the actual exe/pdf/zip/txt/doc/etc. on the CD for
the driver software installation routine.

On each disc, the website is contained within a folder on the root. The
site within the folder includes all html pages, as well as other subfolders
that contain the various exe/zip/txt/graphics/css files used. The root of
the CD just has a favicon.ico file and an autorun.inf file, along with the
folder that contains the website. The autorun.inf file just contains:

[autorun]
shellexecute=sitefoldername\index.htm
icon=favicon.ico

This has always been a simple and easy way to distribute drivers, optional
OEM software, system details, warranty info, serial numbers, re-installation
instructions, manuals, etc. to my end users. They just insert the disc, and
their browser opens the index.htm page so that they have a simple graphical
navigation interface. I include a notation on the disc to manually browse
to the optical drive letter and open the index.htm page within the
subfolder, in the event that they have disabled autorun. Never a problem.

Now, due to having a build for a customer who is also a Vista beta tester,
I've discovered that this won't work in Vista (I've done a temporary RC1
install on his system in order to be sure that there won't be any gotchas
when I reformat the drive and he does his own clean or upgrade OS
installation after receiving his system.) I tried his CD on his system with
a temporary XP installation, and all works as expected, but when attempting
this with a clean Vista RC1 installation on his system, the OS refuses to
open or even locate any html pages or exe files on the CD. I know this is a
result of particular security settings, including new virtual user location
mapping features, but I just want for my customers to be able to use their
Drivers & Programs discs out of the box after Vista is shipping with my
systems.

Fortunately, this customer's system needs no drivers to be manually
installed, as RC1 has done an excellent job of recognizing and installing
all component drivers, but I want to supply the default XP drivers, as well
as optional included software/manuals/system details, etc. to him, and the
disc is useless to him while Vista is running.

What to I need to do, as far as altering the CD/DVD contents in order for my
customers to be able to have a usable disc once Vista is shipping? I
greatly appreciate any suggestions.

Russell