To solve this problem, I used a wall at my Osage studio and shot four groups of 6. I carefully measured and locked down two heavy-duty tripods about 20 feet apart and sandbagged them so they wouldn't move. The center of the image falls in the gutter of the two page spread, so it worked well to hid any minor imperfections when I stitched the two photos together. I roughly tested the idea and you can see the results here.
Here are the final two panoramas. Three of the people in the following 4 photographs were shot separately and two heads were grabbed from other images to get the best expressions.Shoetube.com; Denver Foundation's Lauren Casteel; Merrill Lynch VP Marti Awad; former Denver District Attorney Norm Early; Colorado Avalanche forward Wojtek Wolski; The Huffington Post columnist Waylon Lewis; gay activist and aspiring ski bum Daniel Gonzales and Sukle Advertising owner Mike Sukle.
Here are behind the scenes pix snapped by my assistant Randall Bellows: