This hack gives more sophisticated, HTML aware, handling of product images. You an specify the type of image you require in your database, with four options possible at present:

thumb A thumbnail image which references a larger version
image An image file with no related thumbnail
text A text string, to be displayed instead of an image
(blank) No image

This hack also allows you to refer to image file names without needing to include HTML within your database file.

Currently, if you use the 'thumb' option, a hyperlink will be created to large_<image file>, eg foo.jpg will link to large_foo.jpg. Of course to have the large image filename come from the database would not be much work (for someone...)