This is now possible to be done natively in JMP 14 through the Multiple File Import capability (Documentation)
This is a little script to add a bunch of images from a directory to a data table. It expects that the image names will be in a column in the data table. It will then create a new expression column with a formula that pulls the images in. As written, it expects that the images and the data table are in the same directory, but that could be easily changed.
To make the data table portable (i.e., no longer needing to be in the same directory as the images), simply remove the formula from the expression column after it has finished pulling in the images.