I'm running:
XP SP3
Shareport 3.0
1.33NA on my DIR-655
The scanner is part of my HP Photosmart 3210. When I go to the "about" tab under properties from my control panel, there is a list of 47 "driver files" in the window there. I'm not sure I'm savvy enough to answer the driver question. :/
When the USB is directly connected to my computer, everything works fine....printing, scanning, all of it.
I'll also add, that when I attempt to access the scanner from the control panel, the router breaks its connection to the internet briefly. I am mentioning it because I've read other threads where people mention the same thing....fwiw.