Definitely no need to use plugin for that.
You have many different way to use a slider for header in Xtreme, and even more if you have Weaver “Plus” plugin for the theme.
You can Hide the main header image using the option in Main options > Header > Header image section.
Then you can insert your slideshow shortcode in either main options > HEader > Header HTML area, or main options > HEader > Header widget area.
Explore the demo site below for more http://demo.weavertheme.com/