My Epson scanner came with software to do that; yours might not have such software. I don't know for sure, but I've heard of people being able to share scanners in Windows, much like you'd share a printer.
Is your Epson scanner new and who makes the software? That pretty cool!!! I have an older umax and it is connected by an usb port. How do i communicate my computer with the other computer which has the scanner hooked up to it?