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In CS5, I use perspective control on wide angle shots and it can skew the dimensions. Iíve not seen your church interior, so I guessed at the proportions. What I did was do a command/all, then a command/T, used the cursor, and grabbed the frame edge and pulled it away from the shot. Then went to view/show/grid. If the grid is too big or small, it can be changed in preferences. Then used the cursor to grab the small box in the top middle and pulled the image down two spaces on the grid. Then grabbed the small box at the bottom middle and moved the image up two spaces on the grid. Thus keeping the correction even top to bottom. There are movement boxes on left and right as well. When youíve moved the image to how you think it should look, press return, and the change is made. Go to select/deselect to take away the remaining crawling ants! Then use the crop tool to crop out the white space left. To get rid of the grid, do the same view/show/grid and it disappears.
Used the quick selection tool and brought down the brightness of the tile walkway and boosted the shadow and highlight ares in image/adjustments/shadows/highlights.
Hope this helps.