Loved the Not Ready For Prime Time Players too!
This film was great! I also loved the appearances by the early SNL cast. I kept waiting for either Steve Martin or Chevvy Chase to show up but I guess they weren't with the Not Ready For Prime Time Players yet (that's what the first season's cast of SNL called themselves for everyone not as ancient as me and remembers such things :)
I didn't think I'd spot George (Harrison) as I suck at such things but I saw him alright, interviewing in front of Rutles Corp. Glad to hear that most of the Beatles (except HRH Sir Paul, Lord and Master Of All Creation) liked it too. Excellent film!