rebuild from srpms

I want to rebuild some rpms for various reasons, but mostly to change some of the configure settings. I must not be looking in the right place for directions on this, but all I can seem to find are directions on building a rpm file. I'm looking for tips and to make sure that my thinking is correct in what I do. Does building from srpm update the rpm database? To change some of the ./configure settings, would I simply change the spec file, or is there some other way of doing it? Thanks Jeff -- Registered Linux user #304026. "lynx -source http://www.rallycentral.us/~linux/jharris.asc | gpg --import" or "gpg --keyserver pgp.mit.edu --recv-key BD23A31E" Key fingerprint = FB8C 3210 8DE1 78F4 6505 5918 0C34 BE94 BD23 A31E