Address of parents, godparents, etc isn't in the christening records. Occasionally, in some of the older records there is a notation of Balla this or that or Peel or whereever the parents lived which doesn't show up in the IGI. Very rarely the occupation of the father might be noted until you get up after 1850 or so. You usually can get residence and occupation from census records. Your point about godparents is a good one. I wonder if they recorded that sort of info somewhere as other religious records did/do--I've never seen such records on the parish films. Perhaps one of the IOM gurus will answer that one.