The layout of the Meteor Slides slideshow is determined by a template file. You can copy this file into your theme to override the default template and customize the slideshow loop or other markup without hacking the plugin.
Adding a custom slideshow template
Copy meteor-slideshow.php from /meteor-slides/includes/ to your theme’s directory to replace the plugin’s default slideshow template.
Using the slideshow template
One reason you may choose to customize the slideshow template would be to add a title or caption to the slides. To see an example of how to add captions to your slideshow, you can look at the Captions Skin.