how to catch a kernel panic

[Philip Walden <pwaldenlinux@xxxxxxxxxxx>]

I recently installed FC7 over my FC6. FC6 worked fine. With FC7 I 
frequently get a frozen UI system hang. The only cure is a hard power 
reset. This seems to happen mostly during or after extensive install 
(yum) activity.
Yesterday I just happen to have a terminal open where I had su'ed to 
root. I saw a kernel panic message spew across the screen just before 
the system hung. The listing was useless as the the UI was frozen and 
all I saw was the "die" at the end.
I have never seen or dealt with these panic before. Is there a way to 
catch these things in a file in order to help sleuth out the problem?
Philip