[groovico]

Depends what you are using the thumbnails for.

I assume your using them to show Color blocks or some sort of material image to show different variations so the customer knows what they can choose from?

You could just create a bitmap with the small tiles put on it in a block of 5 across and just upload that as a detail image so it would look like

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thumb description

bigimage with 5 small pasted images on it
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However if all your products are showing different colours/image blocks and you need a dynamic system we've got a mod we can do that does the above automatically.

PM me if that's what you are after and I can give you a quote for it.