Hi,
Jsmallfib is a Joomla content plugin. So it works good in joomla articles but an HikaShop product page is not an article.
You have to use some little PHP code in order to display it in the product page, thanks to a view override.
They are a lot of thread which talk about the problem. Here the first found with a little search: "hikashop module product page"
www.hikashop.com/forum/4-how-to/34371-di...uct-pages.html#34400
More than that, you have to understand that this nice uploader is not compatible with the HikaShop custom field system.
To be honest, it won't work as you are expecting and it will be never the case unless you made a lot of modification in the code of the Jsmallfib.
When I said that the custom field system can be extended using plugins, I didn't say that it work directly with "content plugins" or any other joomla plugin. It has a specific structure and a compatible plugin should respect the requirements.
What I said is, it is possible to extend the system but it requires PHP and Development skills, that's why I mentioned the developer documentation. Because it's a developer task.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.