John Williams USA kernel 2.6.28-11.42-generic

[<john31608@xxxxxxxxxx>]

Hi
    This is in reference to attempted installation of an agrsm 0620 modem 
driver from file Ubuntu-9-0-4.  Josh Crawford on Mon AUG 24 related I need 
to check that I have kernel source files installed not just headers.  My 
/usr/src directory does not have kernel source files.  I have been unable to 
locate any such files on my installation nor on the install CD.  This is a 
brand new installation.  Does this mean I should download a kernel source 
file from www.kernel.org?  I notice they don't have a match for my kernel. 
I started downloading linux-2.6.28.10.tar.gz along with a signature file. 
Would I need to just install or do I also configure and compile a new 
Kernel?  I'm not geared up for automatic updating yet.  This is all very new 
to me.  Thanks, John W