I've just submitted v2.0.0 of the plugin for review. This version:
  • Drops support for Zen Cart versions prior to 1.5.5.
  • Includes a template-override folder (YOUR_TEMPLATE) version of the jQuery script that performs the scrolling.
  • Removes the plugin's default jQuery load; your active template is "presumed" to include jQuery at this point!
  • Updates the readme to note that, like with all sideboxes, the Layout Boxes Controller must be run as part of the plugin's installation.

I'll post back here once the update is available from the Zen Cart plugins.