OES SP1 Patch CD problems...

> updating OES using SP1 isos, and it won't install any of the patches (using
> the Yast->Patch CD method). it says "error: rpm has invalid signature" for
> every patch on the CD. ISOs were good on the checksum when I burned them.
>
> any ideas?

****SOLVED****
the GPG-Keys fixed the issue...helps to read the documentation, although
Novell can sometimes make it a PITA to find the proper docs for what you're
trying to do...