Hi rogerb218,
The instructions on how to remove and replace images in our FAQ actually only applies to the images within the description. In order to add a gallery image to an active listing, you would need to revise the listing via the following process:
1) Visit the item on eBay.
2) Right-click the image you’d like to make your new header/gallery image and click “Properties”
3) Copy the image URL, which begins with http://...
4) Click the “Revise your Item” link at the top of the auction page.
5) Click the “Add Pictures” button.
6) Delete the text(if any) in the “Enter URL…” field(if any) and replace it with the copied URL.
7) Click the “Insert Pictures” button and save your changes.
Any additional questions or concerns? Please feel free to contact our customer support team using the appropriate link on our help page: http://www.auctiva.com/free-auction-software-help/help.aspx
-Mike