network driver

  I have a new dell machine that I installed gentoo on using the 
telemetry box live cd. The network card is an intel Pro/1000 mt ,
driver source code is availible from intel.
I am having trouble compiling the driver.
I tried to compile it on another machine and it worked,
except the kernels were not compatible,so it would
not work on the gentoo box.
I should be able to use the command "make install",
I kept getting the error "kernel source not found".
I edited the Makefile to point to /lib/modules/2.4.19-gentoo-r7/include/linux,
and now I get tons of warnings,the end of the messages says
make: *** [e1000_main.o] Error 1.
I have been using linux for a couple of years,but I am no
expert. Any help on how to get this driver compiled for
gentoo would be very helpful.

                                           thanks,
                                             ED