Jacko,
No, 1441 does not supercede or render invalid the previous resolutions. Do you really think the USA would have worded it that way? If it had, then the No-Fly zones would now be invalid.
You miss the point of the No-Fly zones. Anyone, at any time, can act in self defense. The No-Fly zones, however, authorise the engagement of any Iraqi military aircraft regardless of whether they present a threat or not. The continued air attacks against C2 sites also cannot be legally construed to be in self defence as they present no direct threat.