That's an easy fix I've made myself in the past, since I usually like to have a little fun with the text in the gallery!
You can control what text displays in the scrolling gallery by mousing over the Gallery tab in your account and clicking on Manage. On the next page click on the Text & Placement tab and you will see the different areas where you can edit text that will display in the scrolling gallery and save your changes. Unlike positioning and color changes, these will take immediate affect on your listings on eBay right away which is great.
Hope that helps!