Kernel Source build troubles

[TGS]

Now that the source for the kernel has been moved, I cannot figure out how
to build it.

I tried to do the following and get an error.

rpmbuild -ba SPECS/kernel-2.6.spec
error: Architecture is not included: i386

then I tried 

rpmbuild -bs SPECS/kernel-2.6.spec
Wrote: /usr/src/redhat/SRPMS/kernel-2.6.7-1.471.root.src.rpm

which looks as if it is the src rpm already installed.

Looking in the BUILD directory, I see a load of potches and a tarball, which
I imagine is the src.

How can I get to the /usr/src/linux... that I am used to dealing with?