Why not simply turn on borderless printing and in the normal print package set the left and top margin to zero? Set the cell size at 8x10 and set the right margin to 0.5 and the bottom to 1. Do realize that if you do borderless printing, the driver scales up your image by a small amount, making your image slightly larger than 8x10. So to get exact 8x10 borderless, you'll have to trim a similar amount that the printer trimmed at the left and top manually.
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