I was just coming in to ask a similar question which I'll still do below. If you've disovered the answer to your question, maybe you could pass it along? Or, may my thought on doing this is workable but I can't risk testing it at the moment.
Here's what I was going to post ...
I would like to add an additional field of data to product detail pages that is able to accept HTML. Basically to be used in a manner similar to the detail images but more flexible. With detail images, if you want to have text it has to be in the image and therefore high-K and not very flexible.
The "extra fields" feature creates char(255) type fields which do not accept HTML and are basically intended to add product-specific text. The benefit is that these fields already "know" the items they are associated with and appear on the admin's product entry page.
One simple solution would seem to just change the type of that field (the "value" field in the "xcart_extra_field_values" table) to "text" which would be the same as the "fulldesc" field in the "xcart_products" table and should accept and allow the browser to interpret HTML tags.
Does anyone know if that would mess things up (xcart upgrading not withstanding)? I do have the Market Manager mod on this which has put a "cost" field in but that is the only extra field in this xcart store at the moment.
xcart v4.09
Thanks
John
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