Helen,
Brian's site (that would be Brian Hicks, who was reelemusic) has not been online for some time, but he gave Kathy Barthen of Ireland Now, permission to mirror his site. She does not have his lyrics files, but she has the midis and pretty much the same set up otherwise. That mirror is at Ireland Now's Music of Ireland (http://www.irelandnow.com/heritage/music/irishmusic.html).
Brian himself is online at The Feif of Brian (http://www.iswiz.com/). If you go there you'll notice that part of the reason he stopped is that BMI hit him with $500 a year for the rights to tunes...