I went home last evening and immediately found my VHS copies of both of these TV segments. Here is some additional information for the TRIBUTES filmography entries.
1. The Bill Geist report was, indeed, from The CBS Evening News, although I don't recall if it ran on Saturday or Sunday. It was, however, during the weekend of the 1991 Three Stooges Convention. The report runs at about 2:10 in length. Most of the people interviewed were general fans, although Stooge impersonators Billy West (Larry), Ken Heath (Moe) and David Knight (Curly) were all featured. Gary Lassin was also included. The report also featured clips from the public domain shorts Disorder in the Court and Malice in the Palace.
2. The Michael Chiklis appearance on Late Night with Conan O'Brien is definitely from April 19, 2000, as the label on my VHS tape confirmed. The entire interview is about the Stooges, either the act or the 2000 ABC bio-film Chiklis was in. The segment runs at about 4:30 in length.