yum localinstall error

[Andrew Robinson]

I'm trying to follow the instructions in the Unofficial Fedora FAQ for 
installing Java on my system. Everything seems to work up to the point I 
issue the command

yum localinstall /usr/src/redhat/RPMS/x86_64/java-1.5.0-sun-*

The usual yum stuff happens until the command dies with this message:

unsigned package java-1.5.0-sun-demo-1.5.0.06-1jpp.x86_64.rpm

Is there a way to tell yum to install an unsigned package or is there a 
way to sign these local packages?

Thanks!

Andrew Robinson