PS CS3 distort with anchor

[jwt]

When I create panoramas in PS, I often need to distort portions of images to get it looking right. I've attached an image to help illustrate my question. I'd like to distort the bottom part of the shape which is bounded by a red line to another part of the image. When I do that in PS, the red line also distorts and disconnects from the blue box, creating an obvious seam. How can I anchor the red line so I can generate the shape on the right from the one on the left? The picture on the right is an extreme example of what I wish to avoid. I want the interface between the wall and ceiling to be an anchor point that is not involved in the distortion process so that it retains its continuity.

 

[MathiasVagni]

Warp tool!

In the absence of a better idea, I would, very, very carefully use the warp tool not touching the 'anchors' which shouldnt move... Try that.

Cheers,