When you point the goods in the photo in the catalog and in standard modules, the main photo changes to the first additional image of the item. The module is made in the form of a modifier (ocmod).
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Description:
When you hover the photo in the catalog (category, special, search, manufacturer_info) and standard modules (latest, special, featured, bestseller, product_tab, popular, ajax_viewed), the main photo changes to the first additional image of the product.
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With this function, the selection of products in the online store is very easy. This is an indispensable thing to simplify the search for goods. Many large stores have this feature.
 
Example of work:
http://hardcandy.top
 
The module is implemented for 2.0-3 versions.

The module is guaranteed to work on a standard template.
Also Free finished off under non-standard themes in case of module purchase and incorrect work.

Those support is present.
 
Installation:
1. Go to the section of installing extensions
2. Install the ocmod extension
3. Update the modifiers.