We can't exactly offer support for mIDas since it's not a Technic thing, and you haven't said what you used it to do or anything really. Just that you used some patcher and now some (all?) your pipes are gone? BC or Redpower pipes? Gotta include more info my man. There's a stickied thread at the top of the bug forum list that you should have read first.
If I had to make a guess with nothing to go on, I'd guess that somehow you've removed the pipes from the ID list so they're no longer working. I'm not familiar with mIDas at all though.
