When inserting the packager flag into ~/.rpmrc (or even /etc/rpmrc) rpm responds with "bad option 'packager' at ~/.rpmrc:<lineno>"; the same with other options like signature, pgp_name or pgp_path. The old rpm version worked with the examples from http://www.redhat.com/mirrors/LDP/HOWTO/RPM-HOWTO-6.html#ss6.1
Rpm-3.0.x accomplishes the same task (in your case) by putting in ~/.rpmmacros (or /etc/rpm/macros): %packager whatever Ditto for signature configuration. Here's what I have in my ~/.rpmmacros: #%_signature pgp %_pgp_name Jeff Johnson <jbj> %_pgp_path /home/devel/jbj/.pgp %_signature gpg %_gpg_name Jeff Johnson (ARS N3NPQ) <jbj> %_gpg_path /home/devel/jbj/.gnupg