OK, I have done some progress and also messed things up.
The good news is that I achieved the tabular look simply by...inserting a table with an HTML editor, so those wrap-arounds are no more.
But...I still need additional images to display *vertically* under the main image.
I have tried a mod in the downloads section but it relocates images horizontally and messes up the whole look of the product info page.
It is basically a tweak to product_info_display.php.
Can somebody help with that?
Thanks!