Add/Modify Category Page or Product Page

[AHTaylor1968]

VM: 2.6.10
php: 5.4.31
Joomla: 2.5.24

I want to add a link either in the category layout page or on the product page which will allow the user to see a biography for the artist whose work they are viewing.  I have the code but am not sure where to put it.  I dont want to put in the main html as this will show on all pages so where can I locate the html for the category or product pages.

Thanks

[jenkinhill]

You could add it to the category description if there is one artist/category or for product details you can add it to the description, add it as a custom field or (what I do) use the manufacturer field. Then the bio can be shown in a popup with a link to their own website.