CMS Made Simple Forums

I have installed the module productmanager. I'll use is as an simple list of product, but with an image (thumbnail) in the summary.
I do have a custom field (calles image) with the product. I cannot find how to show it in the summary template.
What to do to?
I would also like to show the thumbnail in the detail template and when clicking on it, show the original size, is this possible?

Thanks!