We've put in Easy Slider HERE

We followed (up to a point) the install method KERRIN HARDY advocates (Google for her site).

Where we disagree with Kerrin is her instruction to put the HTML <div> code into index_default.php .

No need to do this... You can put the HTML into the define_main_page.php using the tools >>> define pages editor, remembering of course to toggle out of WYSIWYG and into source mode, before you paste the DIV.