Kernel build?
The details you have provided are NOT for a kernel build, but are in fact for a FreeBSD upgrade - it's called a "make buildworld" process.
In fact, a kernel build (and only a kernal build) is as follows:
(1) cd /usr/src/sys/i386/conf
(2) make a copy of GENERIC and call it something else, eg MYKERNEL
(3) edit MYKERNEL correctly
(4) /sbin/config MYKERNEL
(5) cd ../../config/MYKERNEL
(6) make depend
(7) make
(8) make install
(9) if all has gone well, reboot!
I have summarised Chapter 9.3 of the handbook:
http://www.freebsd.org/doc/en_US.ISO...-building.html
Let me know if you have any further problems