My bid is conditional on my assumption being correct that the product panel you refer to is, or is similar to, a WordPress catalog plugin. Bearing in mind that I've no details to work with, I further assume you want to add more fields to the catalog description, that you need screens modified appropriately for writing and reading these new fields and that you want those fields stored in the WordPress MySQL database.
All that being true, I will make a copy of your plugin, makes the changes in the underlying PHP and test it in my test WordPress site before passing it back to you.