I believe that I've seen only one of Dan Ireland's films.
Ireland was one of the executive producers on the 1988 thriller MIDNIGHT CROSSING. Roger Holzberg directed the film. The unreleased score was by Steve Tyrell.
Ireland was one of the executive producers for the comedy horror film WAXWORK. He also had a small role as a zombie in the film, as did his secretary Karen Schaffer. Anthony Hickox directed the 1988 film. Roger Bellon's score has been made available as a download.
Ireland was an executive producer on TWISTER. But this was not the famous 1996 disaster film, but instead was a 1989 offbeat comedy starring Harry Dean Stanton and Crispin Glover. Michael Almereyda directed the film, which has an unreleased score by Hans Zimmer. I saw this film on video about 15 years ago.
Ireland was the co-producer on Ken Russell's 1991 drama WHORE, which the director said he made in response to PRETTY WOMAN (1990). The unreleased score was by Michael Gibbs
Ireland directed 2005's MRS. PALFREY AT THE CLAREMONT. In the film, an elderly woman (Joan Plowright), all but abandoned by her family in a London retirement hotel, strikes up a curious friendship with a young writer (Rupert Friend). The film won Audience Awards for Best Film at both the Newport Beach and Palm Springs International Film Festivals. Stephen Barton's score was released by Movie Score Media.
Ireland used Harry Gregson-Williams on three films, The Whole Wide World (feat. Zimmer), Passionada and Jolene. I guess Ireland knew Zimmer through 1989's Twister.