This is the procedure I used to get my new Epson Perfection 3170 running with iscan.
I am running FC3 with kernel 2.6.10-1.241_FC3 and sane-backends 1.0.15-1.4. I downloaded iscan-1.14.0-3.i386.rpm from http://www.avasys.jp/english/linux_e/dl_scan.html, and installed it with the rpm command. I did not make any configuration changes, and executed iscan in root mode. iscan found the scanner and did a preview scan of of a postcard with text and colored pictures. I then executed iscan in user mode and scanned a document with text and colored pictures to a file, and to the printer. Everything worked perfectly. I am barely started using the new scanner, and will report further as I gain experience. My next My only complaint so far is that, when I phoned Epson, they told me that they provide no support for the scanner on Linux. They didn't even mention that I could download the iscan rpm. I have ordered an ADF for it.