To add brand affiliate/partner company logos to your eCommerce site, select Sell>Locations, Brands & Affiliates in the Peoplevine Control Panel.
If you've already created a business directory, click the edit button next to each business listed and attach a logo where prompted in the "Business Details" section. Once attached, click "Update Business" and the logo(s) will be populated on your site.
See here for an example (scroll to bottom).