i got a working driver by doing the following;
downloading the release from this thread http://www.laptopvideo2go.com/forum/index.php?showtopic=9820
extracting the files into a folder and then downloading the .inf file from the same thread and overwriting the one that was extracted.
i then went into hardware manager and updated the display adapter from there, rather than running the set-up provided in the release, by pointing it to look for the .inf file in the folder created above.
this worked fine and appears to give me a very capable graphics driver for my m90 quadro fx 1500M and has made windows vista beta 2 look much much prettier 😄