There have been other discussions about this on the BBS. I think someone said there's a piece of third-party software that allows you to do this, not sure.
What we do here is to have a folder on the computer's hard disk called "Scans", and share that folder. Then when we walk up to the scanner to put something into it, we scan it and save the image to that share. Then we take the thing out of the scanner, return to our desk, and retrieve the image across the network.
See... to me, the whole idea of a networked scanner misses the point that you still have to walk up to the thing to put stuff into it. So what's the point of controlling it across the network if you still have to walk up to the thing to get the job done.