[ubuntu] Detecting > 1 scanner, picking which to use

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http://ubuntuforums.org – I have SANE and SANE-scanner installed in my Ubuntu 12.04 box. I have an Epson V500 flatbed scanner, tied by USB to my machine. On my network I also have an HP All-in-One that has scanner functionality. Both are detected by the computer as scanners. I want to always use the Epson scanner but can't find a way to tell SANE-scanner to use the (second listed) Epson scanner. It always tries to scan using the HP All-in-One, Any guidance how to remedy this would be very gratefully appreciated. Chagrined in Minnesota... (Hardware)