There's a workflow issue here that is confounding the problem.
1) Rip with Media Center. It will present either CD data (obtained from first JRiver's YADB, or FreeDB), or provide the opportunity to enter the data. The CD look-up database used by iTunes is not used by MC. Many CD look-ups succeed; some are not yet in the YADB database (but are likely in the FreeDB database); still, sometimes new CD data requires someone to enter the Album, Artist, Genre and Year.
2) For your existing files, you can ask MC to obtain properties based upon your file's locations. See Library Tools > Fill Properties From Filename
Honestly, getting CD album and track properties takes a couple of seconds at most. There's a lot of power at your fingertips that you'll come to appreciate; give it a little time.