How to apply kernel source updates.

Greetings folks.

Can anyone tell me how to apply Red Hat's source update RPM's to the original 7.2 kernel 
source tree?  (I hope this is not a dumb question, but I have spent many hours trying to find 
a set of instructions/hints on the RH site and through Google without any success.)  I don't 
actually want to recompile the whole kernel, just a driver module which I need.


Background...

I am trying to set up a gateway/router based on RHL 7.2 using the DLink DFE-580TX quad-port 
NIC.  It doesn't work with the standard "sundance.o" kernel module that kudzu sets up and I 
have worked out that I need to compile an updated one.

So I have down-loaded the module source from Donald Becker's www.scyld.com site as well as 
the source RPMs for the latest kernel update (2.4.18-27.7.x).  However the kernel source RPM 
unpacks into a bunch of config & patch files, with a few awk & script files thrown in for 
good measure, and I haven't any idea of how to proceed.  (It's obvious I'm not a kernel 
developer!)

If I just go ahead and compile the module anyway, then insmod reports that the module 
requires kernel 2.4.7-10 and lists a bunch of unresolved symbols.  So I guess I'm stuck... 
"help!"

Best regards,
James.