Cryzed, many thanks! As the log said JAILBREAK FAILED, I trusted the log and did not even try to install a hack. So I have now installed the screensaver hack and it's working perfectly.
So, as Emily Litella says, "never mind".
But I have to ask, what is the purpose of the "rescue pack" and why is it a "really good thing to have" the working jailbreak without it? Thanks again.