I think i have figured it out. Vista just fucks up the driver path during installation. This can be seen in C:\Windows\inf\setupapi.dev.log
So what you have to do is check in this log file where Vista was looking for the .sys file, which is most probably in C:\Windows\inf , although it SHOULD have looked in C:\windows\system32\drivers (where all the .sys files happen to be, eh…)
If it is the case, just copy the .sys file in C:\Windows\inf , delete the one in C:\windows\system32\drivers and do the “update driver” part of the readme.
Try it anyway if there is no log file.
If it works, please post feedback here, and I’ll update the readme.