Just a comment....
The basic jist for the OSX build instructions for the HP1020 using macports found at http://foo2zjs.rkkda.com/INSTALL.osx
works just fine for the OKI C5100N as well (although obviously doing the getweb 5100 for the OKI ICM files before the final make install)
The OSX Printer configuration app found the correct driver with absolutely no issues, and I was printing in seconds.
Color needs to be enabled using the CUPS interface, as it defaults to monochrome by default.
Thanks TONS for building foo2hiperc!!!