compile driver file problem, different version of kernel image and kernel source, any clue?

[kean <kean@pcdom.org.my>]

Hi-
trying run debian in new dell poweredge server rather redhat. everything 
workout fine until I get stuck in the networkcard problem.
Couldn't find the e1000 network card binary driver for the kernel 2.4.20 
image. Then I'm trying to compile one for it. The result ... compile 
fine but it's give me error while probe the module and after look into, 
this is because the kernel image is 2.4.20 and the kernel source I have 
in /usr/src/ and /usr/include is 2.4.18

So download the kernel-source-2.4.20.deb and patch it, it's seem like 
it's the package only patch the source in /usr/src not /usr/include. so 
while reload the network card driver again, it's said version not 
compatible. And I had to manually modify the /usr/include/version.h
to linux version magic number
#define LINUX_VERSION_CODE 132116

reload again, no version problem, but new error message said that 
init_module error, possible cause by wrong module parameter, IO paramter 
and IRQ parameter.

I guess the problem in in the header file /usr/include, and I just 
wondering why while install kernel-source-2.4.20.deb is not replacing 
the /usr/include and how to replace or install 2.4.20 header file in the 
/usr/include without screw up the system and make my network card driver 
 compile and work.

kean