Fedora Core 5 RPM Problem

[lbduballstrs]

I'm trying to install packages from RPM's that I download and it keeps saying that they don't have a public key. It gives me the option to install anyways but it doesn't install the package. It only happens with packages I download, not the one's from the package manager. Any idea on how to get around this problem. Keep in mind that I am pretty new to Linux. Thanks

 

[Law]

What is the exact error message?

 

[lbduballstrs]

Ahh I just gave up on it. I decided to use Ubuntu instead and its working fine. Thanks anyways.