Think is better to install Fedora 8. FC3 is too old and currently unsupported.
If you can't do this, use the command:
rpmbuild --rebuild yum-3.2.8-1.src.rpm
to install the source rpm and create the binary rpm, then you can install using.
rpm -ivh new_package
But no guarantees. FC3 is too much old.
Pietro Pesci Feltri
PowerBook 15" G4 and
MacBook Pro 17" Intel Core 2 Duo
Intel I5 Desktop