Below are two example banners, the first shows AffiliateClick setup to point to site1 (homepage), the second to point to site5 (AffiliateClick page). There is no need for a gateway option as this program is not click-revenue based. AffiliateClick can link to multiple sites, or pages within your sites, whilst still tracking sales.

Pointing to site1.

Pointing to site5.

You don't even have to use banners, you may choose to use text links and/or banners.