i have a fc5 machine with a very slow modem internet connection, so I set up a local yum repository holding most of the core rpms. With the other network repo's disabled, I can install from it fine. But when the network repos are enabled, and an install has core dependencies, yum gets them all from the network repo even though many are available locally. Is there some way to specify a repo "preference" so that the local repos will be used to satisfy dependencies before going to remote repos?