SANE 1.0.19 was the first version to include hp3990 backend. Fedora 8 shipped 1.0.18. I recommend a SANE upgrade. Forget the hp 3900 site, or any other random docs you might have read, and do the following as root:
rpm --nodeps -e sane-backends rpm --nodeps -e sane-backends-libs yum -y install libusb-devel download the sane 1.0.19 tarball from www.sane-project.org extract the tarball, and cd into it ./configure --prefix=/usr --sysconfdir=/etc --disable-locking make make install scanimage -L If there are any errors along the way, you should investigate why. A smart sysadmin would also investigate every one of these commands, and probably do the configure and first make as someone other than root, since you cannot be sure I am a nice guy :) allan