Hi,
You can change the template using the method in the following post:
changing photos in an active listing
When you use this method, after you make your revisions to the listing in Auctiva, you are copying the entire HTML for the listing including the template. I have changed templates, photos and just about everything else this way.
Let me know exactly what it is saying to you when you try.
Also see my reply to your post in the above thread.
Terence
COZI COLLECTIBLES