troubles building kernel

[EBEIGHE bicyclewheelers.com]

hi there.
i've never actually built a kernel before, so I'm having newbie trouble -- I 
wonder if some kind soul can set me straight?

Trying to keep things simple, I am attempting to build the exact kernel that 
my system already has, FC3 (2.6.9-1.667). I downloaded the source, 
configured it (It is the same .config as is in the configs directory for 
i686) and built the bzImage.

rpm -ivh kernel-2.6.9-1.667.src.rpm
rpmbuild -bp --target=i686 /usr/src/redhat/SPECS/kernel-2.6.spec
make bzImage

This all seems to go okay, but when I try and boot with bzImage, it gets a 
couple of errors like:
"error inserting /lib/jbd.ko" and "error inserting /lib/ext3.ko", and then 
panics.

Do I *have to* also build modules? I wouldn't think so, since I am just 
trying to build the same kernel.
Does the system.map file matter?

Thanks.
Ed