differences between kernel-tree and kernel-source and kernel image

[David Piniella <dpiniell@newssun.med.miami.edu>]

   I'm running 2.4 now and would like to /try/ to get 2.6 on my 
machine. I've had problems with apt-getting images, but doing an 
"apt-cache search kernel" showed me a package "kernel-tree-2.6.5" -- 
will this install the kernel or try to patch an existing 2.6 kernel or 
something else? How can I find this out without installing the package?

thanks,

--
David Piniella
University of Miami