CSS and Plug-In Lab Horizontal Image Menu Extension

I have purchased plugInLab's horizontal image extension, and have run into a problem.  I am using the menu generated in a PHP include, and it seems it applies the anchor style from my external stylesheet momentarily before loading the javascript.  PlugInLab support suggested creating a style for my links, but this would require changing thousands of links to reflect the new class.  I was wondering if anyone else has experienced this problem.  Basically the text for the menu displays in bold, then once it is fully loaded, goes to normal type.  Here is a link :http://www.danshamptons.com/content/danspapers/issue10_2009/01d.html

I tried defining a style for the menu items, but this does not seem to work.  Any input would be greatly appreciated.

Thanks,

Colin