Zacko: You need a program that can correct the distortion (like AutoStitch or Panorama Factory), then it's not a real problem. Shooting from a tripod with a bracket that allows you to rotate around the nodal point solves a sh*tload of problems aligning the images.

You might also look into PanoTools. It's free and a plugin for photoshop. It requires a bit of work, but it can correct your distortion.

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