UPDATE! After hours of trial and error, here is the solution to remove the PICTURE field that is next to the item description.
It is in this file:
/common_files/customer/main/product.tpl
REMOVE THIS LINE:
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{*<div class="details"{if $max_image_width gt 0} style="margin-left: {$max_image_width}px;"{/if}>*}
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The field is created by how big your picture file is. So it sets that column by seeing how big your picture is. Remove this line and the column is gone... leaving lots of room for the full description. See the attached files for the result.