Updating to net-snmp 5.3 on Fedora Core 4 (FC4)

Hi,

I'm running Fedora Core 4 with net-snmp-5.2.1.2 and am having trouble
updating my system to net-snmp-*  v5.3 using yum and the "fc4" rpm files
found on the net-snmp download site at sourceforge.net.  Has anyone else
running FC4 been able to successfully update all the net-snmp packages ?

First of all, I'm not sure why the filenaming convention is different on
sourceforge.net than it is on the FC4 update repositories.  The packages
installed on my system are:
    net-snmp
    net-snmp-utils
    net-snmp-perl

On sourceforge.net (http://net-snmp.sourceforge.net/download/)  the files
listed don't correspond directly to these packages.  Is it not true that the
rpm filename is supposed to match the package name, version & architecture
of the target system?

Ignoring the filename mismatch, I downloaded the following two rpm files:
    net-snmp-5.3-1.fc4.i686.rpm
    net-snmp-perlmods-5.3-1.fc4.i686.rpm

First used "yum localupdate" on the net-snmp file... It failed with the
following error:
    Package net-snmp-5.3-1.fc4.i686.rpm is not signed
This doesn't look like the kind of error where I'm missing the key, but
maybe it is.  In any case, I modified the /etc/yum.conf to bypass the gpg
check, and this time the package installed ok.

However, the I'm unable to install the net-perl-perlmods files because of
the following error:
    Cannot open file: net-snmp-perlmods-5.3-1.fc4.i686.rpm. Skipping.

I also tried removing all of the installed v5.2.1.2 net-snmp-* packages and
retrying with "yum localinstall", but got the same error.  I can't seem to
get beyond this point.

Has anyone had success with this yet?  I could just download the source and
install locally without involving yum or any package managers, but I'd
rather understand what's going on here.  Package managers always seem to be
great when everything works smoothly, but frustratingly difficult when
there's the smallest problem (in my experience anyway).

Thanks!
-- Brad