I have an arbitrarily curved path, and want to break it up into segments of fixed length. i.e. I have a squiggle, and want to turn that path into 1-foot segments, plus a remainder portion. How
Object → Path → Add Anchor Points function adds an anchor point in the middle of other anchor points, but you don't have control over the length of segments.
If you know the length of the original path, you could work out how long the segments are. I'm not sure if that helps you in your specific situation though.
You should try CADtools from HotDoor, it's a plugin for Illustrator.
For making equal segment on curve: Use