You can actually do it in Auctiva's One-Page Lister. When you design your listing, there is a section where you can fill in for your template title. I believe it is next to where you modify your layout.
If you do a lot of bulk listings all at once, then this could be a little frustrating, but I believe if you leave the template title blank in your bulk listing template, your auction titles default as the template title.
Hope this helps...Jack