is it possible to downgrade kernels after deletion?

[Clint Harshaw <clint@xxxxxxxxxxxxxxxxxxxx>]

I've upgraded kernels whenever the latest one came out. Tested it for a 
couple of days and everything seemed to work fine, so I deleted the 
previous kernel (2.6.7.something).

Now I've learned that I can't burn CD's with my current kernel, and the 
recommended solution that keeps coming up is to downgrade the kernel to 
the 2.6.7.x kernel, which I've deleted.

The errors I'm getting are posted at this url:
http://www.penguinsolutions.org/errors

I can't burn cds, even as a root user.

So is there a way that I can put the 2.6.7.x kernel back on here with 
yum? I'm using a yum.conf that is only minorly modified from that one 
found at fedorafaq.org (seamonkey is on there, and I've commented out 
the testing and unstable repos).

Thanks,
Clint