[expert] Building a mandrake src rpm kernel

[Praedor Tempus]

I have never built a kernel from a source rpm before.  I have always used 
tarballs.  The src.rpm places patches and config files, etc, etc in 
/usr/src/RPM/SOURCES...  How does one go about building an src.rpm kernel?

Is there a page that I can go to, a HOWTO?  The proceedure is obviously 
different than with src tarballs.

Thank you for any aid here.  I would like to build the Cooker 2.4.0 kernel 
from the src.rpm...
-- 
Against stupidity, the god's themselves contend in vain.