detailed image box question...
 

Is there a way modifiy the detailed image section so I can put html code there instead of an image?

This is what the extra fields on the products can be used for. You can even modify the products table fields param00-09 to a TEXT type vs a VARCHAR(255) which will allow you to insert more than 255 charachters of data on each extra field on the product. You will need to comment out or find ways to resetup the placement and displaying of the extra fields as they aren't placed underneath the product pages like the detailed images module is. Its also a good idea to change the field on the extra fields for each product from an input type (single line) to a textarea html tag so you can easily insert/edit the HTML on the product pages.

hth. ;)