RPM 101 question: rpmbuild against CVS-extracted files?

[lug at the-leveys.us (Don Levey)]

I'm running Fedora Core 4, so I'm RPM-based and I'd like to keep my RPM
database clean and accurate.  I'm trying to build a package for which
ready-made RPMs (binary or source) aren't available, nor are source
tarballs.  What I need seems only available through CVS checkout.  NOTE: I'm
not a developer, nor do I play one on TV.  I have managed to check out the
latest CVS files, though.

I've done this, and have run autogen.sh to get to the point where I can
configure.  From here, what I'd like to do is create RPMs for the main
and -devel package (in particular, libofx-0.8.1) based upon this source.
However, I don't know enough about rpmbuild to get this to work correctly.
Right now it's giving me an error about a non-existent directory; before I
screw up things any further, does anyone have a pointer on how one can build
an RPM from the CVS tree?

 -Don