Hi silverstringsart! Welcome aboard.
Yes, you may customize one/all of our premade templates. You could take a template like, lets say, "Liquid Blue".
1. Locate the image at the top in the code. Save that image to your computer.
2. Open a photo editing tool. Place in your logo where you feel it is appropriate ( you could even make the image a bit larger, both vertically and Horizontally, if you like).
3. Save the image back to your images folder at Auctiva.
4. Go to the "Manage" link under the Custom Template area on the "Listing" landing page (look towards bottom of the page). On this page you will notice a link "Create from Exsisting" button, click that button and a drop down menu will appear a little lower on the page where you can choose one of Auctiva's templates to customize. When you find the one you want to customize click on it and select "Create".
5. This will take you to the page where you can edit the code. You could then find the header image and replace it with the image you created. Name the template something you can remember and save it.
hopefully this wasn't to confusing and of some help. Give it a shot, you really can't mess things up! Let us know how it goes.